Interesting AGP warning LED problem

On Jan 11, 1:35 am, "DaveW" <radiat....RemoveThis@nuclear.org> wrote:
> It sounds like either your motherboard and/or video card are finally dying
> after all these years.
>
> --
> --DaveW
>
> "kimiraikkonen" <kimiraikkone....RemoveThis@gmail.com> wrote in message
>
> news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com...
>
>
>
> > Hi,
> > I have Asus P4B533 working for many years with no problem till
> > recently. I had some graphic card-related problems then after next
> > boot ups display didn't come or flickering occured.
>
> > However now, the display is provided but AGP warning LED lighted up
> > but the most interesting thing is that also standby (green) led lights
> > up also at the same time during operation.
>
> > The graphic card is also Asus V8170DDR (old) is being used without any
> > AGP warning LED problem since first day of purchase.
>
> > So, please help for these questions:
> > 1-What is the reason of red AGP warning LED + standby LED + good
> > display operation at the same time?
>
> > 2-If i remove this fully AGP compatible card from AGP slot, also red
> > AGP warning LED lights up. Why?
>
> > Note: My graphic card which is Asus V8170DDR/SE Geforce4 MX440 is
> > fully compatible with +1.5V AGP specification and was working with no
> > problem until recently.
>
> > Thanks in advance.
>
> > Regards.- Hide quoted text -
>
> - Show quoted text -

Maybe, i don't know maybe someone confirms, should AGP warning LED
light up eventhough there's no AGP cards installed or no? (mobo
powered-on(stand-by) state)
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:
> On Jan 11, 1:35 am, "DaveW" <radiat... RemoveThis @nuclear.org> wrote:
>> It sounds like either your motherboard and/or video card are finally dying
>> after all these years.
>>
>> --
>> --DaveW
>>
>> "kimiraikkonen" <kimiraikkone... RemoveThis @gmail.com> wrote in message
>>
>> news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com...
>>
>>
>>
>>> Hi,
>>> I have Asus P4B533 working for many years with no problem till
>>> recently. I had some graphic card-related problems then after next
>>> boot ups display didn't come or flickering occured.
>>> However now, the display is provided but AGP warning LED lighted up
>>> but the most interesting thing is that also standby (green) led lights
>>> up also at the same time during operation.
>>> The graphic card is also Asus V8170DDR (old) is being used without any
>>> AGP warning LED problem since first day of purchase.
>>> So, please help for these questions:
>>> 1-What is the reason of red AGP warning LED + standby LED + good
>>> display operation at the same time?
>>> 2-If i remove this fully AGP compatible card from AGP slot, also red
>>> AGP warning LED lights up. Why?
>>> Note: My graphic card which is Asus V8170DDR/SE Geforce4 MX440 is
>>> fully compatible with +1.5V AGP specification and was working with no
>>> problem until recently.
>>> Thanks in advance.
>>> Regards.- Hide quoted text -
>> - Show quoted text -
>
> Maybe, i don't know maybe someone confirms, should AGP warning LED
> light up eventhough there's no AGP cards installed or no? (mobo
> powered-on(stand-by) state)

My guess, bad capacitors either tops bulged (not flat) or leaking from
base, check for brown crud, pay close attention to the larger ones for
power regulation, around the CPU and the ones adjacent to the AGP slot.

Marcus
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:
> On Jan 11, 1:35 am, "DaveW" <radiat....RemoveThis@nuclear.org> wrote:
>> It sounds like either your motherboard and/or video card are finally dying
>> after all these years.
>>
>> --
>> --DaveW
>>
>> "kimiraikkonen" <kimiraikkone....RemoveThis@gmail.com> wrote in message
>>
>> news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com...
>>
>>
>>
>>> Hi,
>>> I have Asus P4B533 working for many years with no problem till
>>> recently. I had some graphic card-related problems then after next
>>> boot ups display didn't come or flickering occured.
>>> However now, the display is provided but AGP warning LED lighted up
>>> but the most interesting thing is that also standby (green) led lights
>>> up also at the same time during operation.
>>> The graphic card is also Asus V8170DDR (old) is being used without any
>>> AGP warning LED problem since first day of purchase.
>>> So, please help for these questions:
>>> 1-What is the reason of red AGP warning LED + standby LED + good
>>> display operation at the same time?
>>> 2-If i remove this fully AGP compatible card from AGP slot, also red
>>> AGP warning LED lights up. Why?
>>> Note: My graphic card which is Asus V8170DDR/SE Geforce4 MX440 is
>>> fully compatible with +1.5V AGP specification and was working with no
>>> problem until recently.
>>> Thanks in advance.
>>> Regards.- Hide quoted text -
>> - Show quoted text -
>
> Maybe, i don't know maybe someone confirms, should AGP warning LED
> light up eventhough there's no AGP cards installed or no? (mobo
> powered-on(stand-by) state)

My understanding of the logic of "AGP warn" is:

If (AGP card is inserted) AND (TYPEDET# = floating) THEN Power_Off_System

That is how it is supposed to work. If no AGP card is plugged in, the
red LED should stay off. It could be that just the red LED driver is
defective.

Note that the circuit consists of a couple transistors, some resistors,
the red LED, and a connection to the TYPEDET#. At least that is what is
on my P4B SDRAM motherboard (one of the first boards with AGP protection).

The board would not be able to power up, if that circuit detects a
problem. The circuit should not be enabled, if no AGP card is present.
When an AGP card is put in place, then the transistor circuit is
supposed to test the state of the TYPEDET# pin. TYPEDET# is supposed
to be grounded - that indicates the video card is using 1.5V for VIO in
the AGP slot.

I would not panic, if the video card has been working for some time.
It is unlikely that something has changed about TYPEDET#. The VIO
regulation on the motherboard is also unlikely to respond to TYPEDET#
floating, and should deliver a steady 1.5V.

So don't worry about it. Just an annoyance.

As for the Standby LED, it is supposed to be always illuminated. On
Asus motherboards, it is connected directly to +5VSB, as a monitor.
You aren't supposed to pull cards or RAM out of the motherboard, if
the green LED is lit. The green LED is there, to warn you to turn off
the power supply, before doing any work inside the computer.

Paul
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 2:54 am, Paul <nos....RemoveThis@needed.com> wrote:
> kimiraikkonen wrote:
> > On Jan 11, 1:35 am, "DaveW" <radiat....RemoveThis@nuclear.org> wrote:
> >> It sounds like either your motherboard and/or video card are finally dying
> >> after all these years.
>
> >> --
> >> --DaveW
>
> >> "kimiraikkonen" <kimiraikkone....RemoveThis@gmail.com> wrote in message
>
> >>news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com....
>
> >>> Hi,
> >>> I have Asus P4B533 working for many years with no problem till
> >>> recently. I had some graphic card-related problems then after next
> >>> boot ups display didn't come or flickering occured.
> >>> However now, the display is provided but AGP warning LED lighted up
> >>> but the most interesting thing is that also standby (green) led lights
> >>> up also at the same time during operation.
> >>> The graphic card is also Asus V8170DDR (old) is being used without any
> >>> AGP warning LED problem since first day of purchase.
> >>> So, please help for these questions:
> >>> 1-What is the reason of red AGP warning LED + standby LED + good
> >>> display operation at the same time?
> >>> 2-If i remove this fully AGP compatible card from AGP slot, also red
> >>> AGP warning LED lights up. Why?
> >>> Note: My graphic card which is Asus V8170DDR/SE Geforce4 MX440 is
> >>> fully compatible with +1.5V AGP specification and was working with no
> >>> problem until recently.
> >>> Thanks in advance.
> >>> Regards.- Hide quoted text -
> >> - Show quoted text -
>
> > Maybe, i don't know maybe someone confirms, should AGP warning LED
> > light up eventhough there's no AGP cards installed or no? (mobo
> > powered-on(stand-by) state)
>
> My understanding of the logic of "AGP warn" is:
>
>     If (AGP card is inserted) AND (TYPEDET# = floating) THEN Power_Off_System
>
> That is how it is supposed to work. If no AGP card is plugged in, the
> red LED should stay off. It could be that just the red LED driver is
> defective.
>
> Note that the circuit consists of a couple transistors, some resistors,
> the red LED, and a connection to the TYPEDET#. At least that is what is
> on my P4B SDRAM motherboard (one of the first boards with AGP protection).
>
> The board would not be able to power up, if that circuit detects a
> problem. The circuit should not be enabled, if no AGP card is present.
> When an AGP card is put in place, then the transistor circuit is
> supposed to test the state of the TYPEDET# pin. TYPEDET# is supposed
> to be grounded - that indicates the video card is using 1.5V for VIO in
> the AGP slot.
>
> I would not panic, if the video card has been working for some time.
> It is unlikely that something has changed about TYPEDET#. The VIO
> regulation on the motherboard is also unlikely to respond to TYPEDET#
> floating, and should deliver a steady 1.5V.
>
> So don't worry about it. Just an annoyance.
>
> As for the Standby LED, it is supposed to be always illuminated. On
> Asus motherboards, it is connected directly to +5VSB, as a monitor.
> You aren't supposed to pull cards or RAM out of the motherboard, if
> the green LED is lit. The green LED is there, to warn you to turn off
> the power supply, before doing any work inside the computer.
>
>     Paul- Hide quoted text -
>
> - Show quoted text -

Hi Paul,
The problem is interesting, although my working graphic card is placed
in AGP slot, the red warnin light lits but although this, system boots
up but sometimes goes through Windows, sometimes hangs at POST and
usually drops into BIOS with comlaning a kind of impoper CPU speed
although all the CPU parameters are default / no OC. I was working on
that system for many years with no problem.

Suddenly, yesterday, while typing , writing on forums, the display
started to go off and come back with irregular times, first i though
it was my old Asus Geforce4 VGA card, but more annoying problems
arised, even my VGA card gave a burn smoke but it worked after that
problem, but now the motherboard gives AGP warning LED + standby LED
and together and my VGA card is inserted and mobo's AGP warning LED
lits when system is powered-off + AGP card inserted, when i boot up,
usually system won't boot with no beep (another interesting point),
then sometimes goes to directly BIOS complaining like "You're in safe
mode, make sure CPU speed is proper" like that which is unrelated to
display.

I want to know the exact and understanding way of these questions
reply:
1-Why doesn't AGP warning LED goes off though there's no card
installed? It sees as an incorrect card is installed.
2-Why does the system goes in to BIOS with complaining with that
message which is unrelated to my VGA card?

Here is the full/exact message in BIOS after opening this PC which is
having a fully compatible AGP card inserted also having a AGP warning
LED also standby led(green):

"During the last boot-up, your system hung for an impoper CPU speed
setting. Your system is no working in safe mode. To optimize the
system performance and reliability, make sure the CPU speed conforms
to the specifications of your CPU."


Meanwhile, Paul, i'm not a BIOS programmer so could you explain what
"TYPEDET#" means?

So, what do you think about the problem? Is the defective part mobo?

Note: All the VGA + mobo capacitors are good, no leakage or bulged
ones.

Sorry if my English is not enough.

Thanks for care...

Regards.
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 11:16 am, kimiraikkonen <kimiraikkone....TakeThisOut@gmail.com> wrote:
> On Jan 11, 2:54 am, Paul <nos....TakeThisOut@needed.com> wrote:
>
>
>
>
>
> > kimiraikkonen wrote:
> > > On Jan 11, 1:35 am, "DaveW" <radiat....TakeThisOut@nuclear.org> wrote:
> > >> It sounds like either your motherboard and/or video card are finally dying
> > >> after all these years.
>
> > >> --
> > >> --DaveW
>
> > >> "kimiraikkonen" <kimiraikkone....TakeThisOut@gmail.com> wrote in message
>
> > >>news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com....
>
> > >>> Hi,
> > >>> I have Asus P4B533 working for many years with no problem till
> > >>> recently. I had some graphic card-related problems then after next
> > >>> boot ups display didn't come or flickering occured.
> > >>> However now, the display is provided but AGP warning LED lighted up
> > >>> but the most interesting thing is that also standby (green) led lights
> > >>> up also at the same time during operation.
> > >>> The graphic card is also Asus V8170DDR (old) is being used without any
> > >>> AGP warning LED problem since first day of purchase.
> > >>> So, please help for these questions:
> > >>> 1-What is the reason of red AGP warning LED + standby LED + good
> > >>> display operation at the same time?
> > >>> 2-If i remove this fully AGP compatible card from AGP slot, also red
> > >>> AGP warning LED lights up. Why?
> > >>> Note: My graphic card which is Asus V8170DDR/SE Geforce4 MX440 is
> > >>> fully compatible with +1.5V AGP specification and was working with no
> > >>> problem until recently.
> > >>> Thanks in advance.
> > >>> Regards.- Hide quoted text -
> > >> - Show quoted text -
>
> > > Maybe, i don't know maybe someone confirms, should AGP warning LED
> > > light up eventhough there's no AGP cards installed or no? (mobo
> > > powered-on(stand-by) state)
>
> > My understanding of the logic of "AGP warn" is:
>
> >     If (AGP card is inserted) AND (TYPEDET# = floating) THEN Power_Off_System
>
> > That is how it is supposed to work. If no AGP card is plugged in, the
> > red LED should stay off. It could be that just the red LED driver is
> > defective.
>
> > Note that the circuit consists of a couple transistors, some resistors,
> > the red LED, and a connection to the TYPEDET#. At least that is what is
> > on my P4B SDRAM motherboard (one of the first boards with AGP protection).
>
> > The board would not be able to power up, if that circuit detects a
> > problem. The circuit should not be enabled, if no AGP card is present.
> > When an AGP card is put in place, then the transistor circuit is
> > supposed to test the state of the TYPEDET# pin. TYPEDET# is supposed
> > to be grounded - that indicates the video card is using 1.5V for VIO in
> > the AGP slot.
>
> > I would not panic, if the video card has been working for some time.
> > It is unlikely that something has changed about TYPEDET#. The VIO
> > regulation on the motherboard is also unlikely to respond to TYPEDET#
> > floating, and should deliver a steady 1.5V.
>
> > So don't worry about it. Just an annoyance.
>
> > As for the Standby LED, it is supposed to be always illuminated. On
> > Asus motherboards, it is connected directly to +5VSB, as a monitor.
> > You aren't supposed to pull cards or RAM out of the motherboard, if
> > the green LED is lit. The green LED is there, to warn you to turn off
> > the power supply, before doing any work inside the computer.
>
> >     Paul- Hide quoted text -
>
> > - Show quoted text -
>
> Hi Paul,
> The problem is interesting, although my working graphic card is placed
> in AGP slot, the red warnin light lits but although this, system boots
> up but sometimes goes through Windows, sometimes hangs at POST and
> usually drops into BIOS with comlaning a kind of impoper CPU speed
> although all the CPU parameters are default / no OC. I was working on
> that system for many years with no problem.
>
> Suddenly, yesterday, while typing , writing on forums, the display
> started to go off and come back with irregular times, first i though
> it was my old Asus Geforce4 VGA card, but more annoying problems
> arised, even my VGA card gave a burn smoke but it worked after that
> problem, but now the motherboard gives AGP warning LED + standby LED
> and together and my VGA card is inserted and mobo's AGP warning LED
> lits when system is powered-off + AGP card inserted, when i boot up,
> usually system won't boot with no beep (another interesting point),
> then sometimes goes to directly BIOS complaining like "You're in safe
> mode, make sure CPU speed is proper" like that which is unrelated to
> display.
>
> I want to know the exact and understanding way of these questions
> reply:
> 1-Why doesn't AGP warning LED goes off though there's no card
> installed? It sees as an incorrect card is installed.
> 2-Why does the system goes in to BIOS with complaining with that
> message which is unrelated to my VGA card?
>
> Here is the full/exact message in BIOS after opening this PC which is
> having a fully compatible AGP card inserted also having a AGP warning
> LED also standby led(green):
>
> "During the last boot-up, your system hung for an impoper CPU speed
> setting. Your system is no working in safe mode. To optimize the
> system performance and reliability, make sure the CPU speed conforms
> to the specifications of your CPU."
>
> Meanwhile, Paul, i'm not a BIOS programmer so could you explain what
> "TYPEDET#" means?
>
> So, what do you think about the problem? Is the defective part mobo?
>
> Note: All the VGA + mobo capacitors are good, no leakage or bulged
> ones.
>
> Sorry if my English is not enough.
>
> Thanks for care...
>
> Regards.- Hide quoted text -
>
> - Show quoted text -

Note to my previous reply:
My powersupply is not defective and has no improper voltage output, i
checked and usually check the outputs through BIOS or Windows. The
values are:

+3.3V --> +3.32
+5V --> +5.1
+12V --> + 12.16
Vcore --> 1.52 (on load, normal for my P4 2.4B 533fsb cpu)

So i don't think it was because of a power supply.

Thanks in advance.

Regards.
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 12:49 pm, Paul <nos....DeleteThis@needed.com> wrote:
> kimiraikkonen wrote:
> > On Jan 11, 11:16 am, kimiraikkonen <kimiraikkone....DeleteThis@gmail.com> wrote:
> >>>>> "kimiraikkonen" <kimiraikkone....DeleteThis@gmail.com> wrote in message
> >>>>>news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com...
> >>>>>> Hi,
> >>>>>> I have Asus P4B533 working for many years with no problem till
> >>>>>> recently. I had some graphic card-related problems then after next
> >>>>>> boot ups display didn't come or flickering occured.
> >>>>>> However now, the display is provided but AGP warning LED lighted up
> >>>>>> but the most interesting thing is that also standby (green) led lights
> >>>>>> up also at the same time during operation.
> >>>>>> The graphic card is also Asus V8170DDR (old) is being used without any
> >>>>>> AGP warning LED problem since first day of purchase.
> >> Hi Paul,
> >> The problem is interesting, although my working graphic card is placed
> >> in AGP slot, the red warnin light lits but although this, system boots
> >> up but sometimes goes through Windows, sometimes hangs at POST and
> >> usually drops into BIOS with comlaning a kind of impoper CPU speed
> >> although all the CPU parameters are default / no OC. I was working on
> >> that system for many years with no problem.
>
> >> Suddenly, yesterday, while typing , writing on forums, the display
> >> started to go off and come back with irregular times, first i though
> >> it was my old Asus Geforce4 VGA card, but more annoying problems
> >> arised, even my VGA card gave a burn smoke but it worked after that
> >> problem, but now the motherboard gives AGP warning LED + standby LED
> >> and together and my VGA card is inserted and mobo's AGP warning LED
> >> lits when system is powered-off + AGP card inserted, when i boot up,
> >> usually system won't boot with no beep (another interesting point),
> >> then sometimes goes to directly BIOS complaining like "You're in safe
> >> mode, make sure CPU speed is proper" like that which is unrelated to
> >> display.
>
> >> I want to know the exact and understanding way of these questions
> >> reply:
> >> 1-Why doesn't AGP warning LED goes off though there's no card
> >> installed? It sees as an incorrect card is installed.
> >> 2-Why does the system goes in to BIOS with complaining with that
> >> message which is unrelated to my VGA card?
>
> >> Here is the full/exact message in BIOS after opening this PC which is
> >> having a fully compatible AGP card inserted also having a AGP warning
> >> LED also standby led(green):
>
> >> "During the last boot-up, your system hung for an impoper CPU speed
> >> setting. Your system is no working in safe mode. To optimize the
> >> system performance and reliability, make sure the CPU speed conforms
> >> to the specifications of your CPU."
>
> >> Meanwhile, Paul, i'm not a BIOS programmer so could you explain what
> >> "TYPEDET#" means?
>
> >> So, what do you think about the problem? Is the defective part mobo?
>
> >> Note: All the VGA + mobo capacitors are good, no leakage or bulged
> >> ones.
>
> >> Sorry if my English is not enough.
>
> >> Thanks for care...
>
> >> Regards.
>
> > Note to my previous reply:
> > My powersupply is not defective and has no improper voltage output, i
> > checked and usually check the outputs through BIOS or Windows. The
> > values are:
>
> > +3.3V --> +3.32
> > +5V --> +5.1
> > +12V --> + 12.16
> > Vcore --> 1.52 (on load, normal for my P4 2.4B 533fsb cpu)
>
> > So i don't think it was because of a power supply.
>
> > Thanks in advance.
>
> > Regards.
>
> TYPEDET# is one of the pins on the video card edge connector. It is
> a way for the video card to declare its preferred operating voltage
> for the I/O signals on the AGP interface. When the video card
> grounds TYPEDET#, it means the video card wishes for 1.5V. When
> TYPEDET# is not electrically connected by the video card, that
> signals a preference by the video card, for 3.3V I/O supply voltage.
>
> To learn more about AGP, you can read this document, stored on an
> archive server.
>
> http://web.archive.org/web/20030314013601/http://developer.intel.com/...
>
> Now, about your problem. Would you agree, that a burning smell is
> not a normal thing ? The burning smell is not coming from the
> AGP warning circuit. There must be some kind of powering problem
> present in your system, and that could make the burning.
>
> The motherboard does have regulator circuits on the motherboard.
> For example, there is a circuit to make voltage for the memory
> sticks. A circuit to make voltage for the Northbridge and the
> Southbridge. A circuit to make VIO for the AGP slot. These
> derive their voltage from a main supply rail. But, typically,
> the voltages are not connected to the hardware monitor of
> voltage. So you cannot easily observe the voltages and see
> that they are incorrect. (You would need a multimeter and
> some knowledge of the motherboard construction, to verify the
> voltages.)
>
> A defective motherboard could produce an improper voltage. That
> could lead to a burning smell. I don't know where that voltage
> might go, and which other circuits it might affect.
>
> So far, your symptoms do not isolate a single cause of the problem.
> It could be the motherboard, but I cannot pick a single item from
> your symptoms, and say that it is proven. And to find a replacement
> motherboard, with AGP slot, that will take your processor, won't be
> that easy.
>
> Your power supply voltages look good, and I don't see a reason
> to suspect your power supply.
>
> Paul

Hi Paul,
Thanks for taking care and good explanations. Here is the current
situation:

Existing AGP card is inserted, mobo boots up and comes to Windows with
no problem, but the AGP warning led is not stable, after some computer
operation it begins to lit for some reason, if i remove and re-insert
card, it doesn't lit. But during normal operation it doesn't lit for a
while, then suddenly it lits but this light has no effect on graphic
or other computer operation. I can play 3D games and surf Windows but
sometimes the screen may go off and come off for a short time.(don't
know the reason also).

Additionaly, another interesting point, if i press or touch the AGP
card slightly with my fingers while it's inserted and operating on
Windows, "sometimes" but not always AGP warning led comes and goes for
an instant. I mean i don't it's a fluky/chance that when i touch the
seated card to make sure it's completely seated, AGP warning LED lits
for a time. But this is rare.

However, the burn smoke on VGA card's GPU is not present, but after
some testing i can report if additional problems occurs about
displaying.

Never had such problems with that good mobo so far, I trusted Asus
components over the years, today i'm so surprised because of an
unknown hardware reason.

Thanks!
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 1:27 pm, Paul <nos....DeleteThis@needed.com> wrote:
> kimiraikkonen wrote:
>
> > Hi Paul,
> > Thanks for taking care and good explanations. Here is the current
> > situation:
>
> > Existing AGP card is inserted, mobo boots up and comes to Windows with
> > no problem, but the AGP warning led is not stable, after some computer
> > operation it begins to lit for some reason, if i remove and re-insert
> > card, it doesn't lit. But during normal operation it doesn't lit for a
> > while, then suddenly it lits but this light has no effect on graphic
> > or other computer operation. I can play 3D games and surf Windows but
> > sometimes the screen may go off and come off for a short time.(don't
> > know the reason also).
>
> > Additionaly, another interesting point, if i press or touch the AGP
> > card slightly with my fingers while it's inserted and operating on
> > Windows, "sometimes" but not always AGP warning led comes and goes for
> > an instant. I mean i don't it's a fluky/chance that when i touch the
> > seated card to make sure it's completely seated, AGP warning LED lits
> > for a time. But this is rare.
>
> > However, the burn smoke on VGA card's GPU is not present, but after
> > some testing i can report if additional problems occurs about
> > displaying.
>
> > Never had such problems with that good mobo so far, I trusted Asus
> > components over the years, today i'm so surprised because of an
> > unknown hardware reason.
>
> > Thanks!
>
> I would not recommend poking the video card while power is applied.
> It would not take too much movement of the AGP card, before there
> would be trouble. AGP uses two rows of contacts, and a slight slip
> would cause the wrong pins to get connected together.
>
> I do not have a complete circuit diagram for "AGP warn". I only
> traced the circuit, from the TYPEDET# pin to a transistor, on my
> P4B board. I did not trace the whole circuit, as that would have
> taken forever. It is very time consuming to trace the copper, and
> without identification for all the components, I still might not
> understand the whole thing. I stopped tracing the circuit, once
> I could see they were using TYPEDET#. (When I first got my P4B
> motherboard, I didn't understand how the AGP warn would work.
> So I traced the circuit just a little bit.)
>
> The idea of the circuit, is supposed to be that the ATX power
> supply gets switched off, if the red LED is on. Your red LED
> operating state, doesn't seem to affect the power supply like
> it should. As far as I know, there are two transistors in the
> circuit. But how they work together, I don't know.
>
> Paul

I agree, make sense. But still confused why the computer boots up
although AGP_warn lits with the card inserted, and also lits when
there's no AGP card on the system.

You mentioned a kind of driver corruption, is it frequent? Or does it
seem hardware AGP_warn circuit problem? Does AGP_warn LED indicate a
serious problem at the moment or just an annoyance?

Thanks.
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 2:06 pm, Paul <nos... RemoveThis @needed.com> wrote:
> kimiraikkonen wrote:
>
> > I agree, make sense. But still confused why the computer boots up
> > although AGP_warn lits with the card inserted, and also lits when
> > there's no AGP card on the system.
>
> > You mentioned a kind of driver corruption, is it frequent? Or does it
> > seem hardware AGP_warn circuit problem? Does AGP_warn LED indicate a
> > serious problem at the moment or just an annoyance?
>
> > Thanks.
>
> Based on your description, the "AGP Warn" circuit
> is not working at all. It seems to have more
> than one fault in it. If the LED lights, the computer
> power should go off (and it did not). The LED should
> not light when the AGP video card is removed (it did).
> I would say the circuit has no predictive ability
> at all now - it is worthless to you.
>
> I am confused as to how the circuit could go
> quite that wrong. I've heard of the light getting
> stuck in the ON state, but never as many different
> symptoms as yours has.
>
> Paul

Confusing than you guess beleive

Until now, i had two determinations about the AGP led situation.

Currently it lits if:

1-No AGP card is installed. And it does its job, you cannot power up
system and behaves as if there's a card on the slot, actually there's
no card. Weird.
2-Correct AGP card installed(sometimes) and, sometimes after some
computer operation or if you touch the card slightly during powered-
on.
 >> Stay informed about: Interesting AGP warning LED problem 

On Jan 11, 2:30 pm, Paul <nos....RemoveThis@needed.com> wrote:
> kimiraikkonen wrote:
>
> > Confusing than you guess beleive
>
> > Until now, i had two determinations about the AGP led situation.
>
> > Currently it lits if:
>
> > 1-No AGP card is installed. And it does its job, you cannot power up
> > system and behaves as if there's a card on the slot, actually there's
> > no card. Weird.
> > 2-Correct AGP card installed(sometimes) and, sometimes after some
> > computer operation or if you touch the card slightly during powered-
> > on.
>
> The circuit needs two inputs. One is TYPEDET#, to sense whether the
> card is an illegal 3.3V one or not. But the other signal, I never
> traced. Somehow, the circuit senses whether an AGP card is installed.
> It almost sounds like that input could be malfunctioning, and
> controlling the circuit more than it should.
>
> Remember, that his circuit is based on simple transistors and
> resistors, An incorrect voltage somewhere could upset the bias
> and so on. It is not like a lot of the other stuff on the motherboard,
> running on pure logic levels. It is an analog circuit.
>
> The circuit must be running off +5VSB, because otherwise it would
> not be able to gate off the PS_ON# signal to the ATX power supply.
> This is a partial block diagram. On my motherboard, the transistors
> were near the AGP slot. The transistors are tiny (SOT-23 ?).
>
> http://www.national.com/images/pkg/mf03a.jpg
>
> +5VSB
> |
> +------+-----+ +--------+
> TYPEDET# ---->| Transistor | | PS_ON# |
> | Circuit |------->| logic |-----> PS_ON#
> CARD_PRESENT ? ---->| | | | on main
> +------------+ +--------+ ATX power
> connector
>
> Paul

Hi Paul,
Thanks for your polite and friendly care so far, however i wanted to
mail from private but it seems it's fake due to spam, doesn't matter.

Currently, the aim of opening the topic is that i sometimes have
display problem like display goes off and comes back for a while.
System doesn't complain as beep or reset like there's no AGP card when
this problem occurs, only monitor doesn't display anything, even i can
see my shared files on the network through a different computer. After
waiting for a while display comes back. That problem is the main
purpose of the topic but the problem brought me to different places
like AGP warn Led or else which are not may be the reason.

Don't know but my current monitor is almost 10 years CRT one, maybe it
may be the reason for this problem. Could be?

I'm using 1024x768 @ 60hz for many years with no such problem. But it
may be dying.

Do you think that "display goes off and comes back" problem because of
monitor?

Thanks!
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:
> On Jan 11, 11:16 am, kimiraikkonen <kimiraikkone....RemoveThis@gmail.com> wrote:
>>>>> "kimiraikkonen" <kimiraikkone....RemoveThis@gmail.com> wrote in message
>>>>> news:150ed2df-70d6-4cd0-add9-79a5c5617797@q39g2000hsf.googlegroups.com...
>>>>>> Hi,
>>>>>> I have Asus P4B533 working for many years with no problem till
>>>>>> recently. I had some graphic card-related problems then after next
>>>>>> boot ups display didn't come or flickering occured.
>>>>>> However now, the display is provided but AGP warning LED lighted up
>>>>>> but the most interesting thing is that also standby (green) led lights
>>>>>> up also at the same time during operation.
>>>>>> The graphic card is also Asus V8170DDR (old) is being used without any
>>>>>> AGP warning LED problem since first day of purchase.

>> Hi Paul,
>> The problem is interesting, although my working graphic card is placed
>> in AGP slot, the red warnin light lits but although this, system boots
>> up but sometimes goes through Windows, sometimes hangs at POST and
>> usually drops into BIOS with comlaning a kind of impoper CPU speed
>> although all the CPU parameters are default / no OC. I was working on
>> that system for many years with no problem.
>>
>> Suddenly, yesterday, while typing , writing on forums, the display
>> started to go off and come back with irregular times, first i though
>> it was my old Asus Geforce4 VGA card, but more annoying problems
>> arised, even my VGA card gave a burn smoke but it worked after that
>> problem, but now the motherboard gives AGP warning LED + standby LED
>> and together and my VGA card is inserted and mobo's AGP warning LED
>> lits when system is powered-off + AGP card inserted, when i boot up,
>> usually system won't boot with no beep (another interesting point),
>> then sometimes goes to directly BIOS complaining like "You're in safe
>> mode, make sure CPU speed is proper" like that which is unrelated to
>> display.
>>
>> I want to know the exact and understanding way of these questions
>> reply:
>> 1-Why doesn't AGP warning LED goes off though there's no card
>> installed? It sees as an incorrect card is installed.
>> 2-Why does the system goes in to BIOS with complaining with that
>> message which is unrelated to my VGA card?
>>
>> Here is the full/exact message in BIOS after opening this PC which is
>> having a fully compatible AGP card inserted also having a AGP warning
>> LED also standby led(green):
>>
>> "During the last boot-up, your system hung for an impoper CPU speed
>> setting. Your system is no working in safe mode. To optimize the
>> system performance and reliability, make sure the CPU speed conforms
>> to the specifications of your CPU."
>>
>> Meanwhile, Paul, i'm not a BIOS programmer so could you explain what
>> "TYPEDET#" means?
>>
>> So, what do you think about the problem? Is the defective part mobo?
>>
>> Note: All the VGA + mobo capacitors are good, no leakage or bulged
>> ones.
>>
>> Sorry if my English is not enough.
>>
>> Thanks for care...
>>
>> Regards.

>
> Note to my previous reply:
> My powersupply is not defective and has no improper voltage output, i
> checked and usually check the outputs through BIOS or Windows. The
> values are:
>
> +3.3V --> +3.32
> +5V --> +5.1
> +12V --> + 12.16
> Vcore --> 1.52 (on load, normal for my P4 2.4B 533fsb cpu)
>
> So i don't think it was because of a power supply.
>
> Thanks in advance.
>
> Regards.

TYPEDET# is one of the pins on the video card edge connector. It is
a way for the video card to declare its preferred operating voltage
for the I/O signals on the AGP interface. When the video card
grounds TYPEDET#, it means the video card wishes for 1.5V. When
TYPEDET# is not electrically connected by the video card, that
signals a preference by the video card, for 3.3V I/O supply voltage.

To learn more about AGP, you can read this document, stored on an
archive server.

http://web.archive.org/web/20030314013601/http://developer.intel.com/t...nology/

Now, about your problem. Would you agree, that a burning smell is
not a normal thing ? The burning smell is not coming from the
AGP warning circuit. There must be some kind of powering problem
present in your system, and that could make the burning.

The motherboard does have regulator circuits on the motherboard.
For example, there is a circuit to make voltage for the memory
sticks. A circuit to make voltage for the Northbridge and the
Southbridge. A circuit to make VIO for the AGP slot. These
derive their voltage from a main supply rail. But, typically,
the voltages are not connected to the hardware monitor of
voltage. So you cannot easily observe the voltages and see
that they are incorrect. (You would need a multimeter and
some knowledge of the motherboard construction, to verify the
voltages.)

A defective motherboard could produce an improper voltage. That
could lead to a burning smell. I don't know where that voltage
might go, and which other circuits it might affect.

So far, your symptoms do not isolate a single cause of the problem.
It could be the motherboard, but I cannot pick a single item from
your symptoms, and say that it is proven. And to find a replacement
motherboard, with AGP slot, that will take your processor, won't be
that easy.

Your power supply voltages look good, and I don't see a reason
to suspect your power supply.

Paul
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:

>
> Hi Paul,
> Thanks for taking care and good explanations. Here is the current
> situation:
>
> Existing AGP card is inserted, mobo boots up and comes to Windows with
> no problem, but the AGP warning led is not stable, after some computer
> operation it begins to lit for some reason, if i remove and re-insert
> card, it doesn't lit. But during normal operation it doesn't lit for a
> while, then suddenly it lits but this light has no effect on graphic
> or other computer operation. I can play 3D games and surf Windows but
> sometimes the screen may go off and come off for a short time.(don't
> know the reason also).
>
> Additionaly, another interesting point, if i press or touch the AGP
> card slightly with my fingers while it's inserted and operating on
> Windows, "sometimes" but not always AGP warning led comes and goes for
> an instant. I mean i don't it's a fluky/chance that when i touch the
> seated card to make sure it's completely seated, AGP warning LED lits
> for a time. But this is rare.
>
> However, the burn smoke on VGA card's GPU is not present, but after
> some testing i can report if additional problems occurs about
> displaying.
>
> Never had such problems with that good mobo so far, I trusted Asus
> components over the years, today i'm so surprised because of an
> unknown hardware reason.
>
> Thanks!

I would not recommend poking the video card while power is applied.
It would not take too much movement of the AGP card, before there
would be trouble. AGP uses two rows of contacts, and a slight slip
would cause the wrong pins to get connected together.

I do not have a complete circuit diagram for "AGP warn". I only
traced the circuit, from the TYPEDET# pin to a transistor, on my
P4B board. I did not trace the whole circuit, as that would have
taken forever. It is very time consuming to trace the copper, and
without identification for all the components, I still might not
understand the whole thing. I stopped tracing the circuit, once
I could see they were using TYPEDET#. (When I first got my P4B
motherboard, I didn't understand how the AGP warn would work.
So I traced the circuit just a little bit.)

The idea of the circuit, is supposed to be that the ATX power
supply gets switched off, if the red LED is on. Your red LED
operating state, doesn't seem to affect the power supply like
it should. As far as I know, there are two transistors in the
circuit. But how they work together, I don't know.

Paul
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:

>
> I agree, make sense. But still confused why the computer boots up
> although AGP_warn lits with the card inserted, and also lits when
> there's no AGP card on the system.
>
> You mentioned a kind of driver corruption, is it frequent? Or does it
> seem hardware AGP_warn circuit problem? Does AGP_warn LED indicate a
> serious problem at the moment or just an annoyance?
>
> Thanks.

Based on your description, the "AGP Warn" circuit
is not working at all. It seems to have more
than one fault in it. If the LED lights, the computer
power should go off (and it did not). The LED should
not light when the AGP video card is removed (it did).
I would say the circuit has no predictive ability
at all now - it is worthless to you.

I am confused as to how the circuit could go
quite that wrong. I've heard of the light getting
stuck in the ON state, but never as many different
symptoms as yours has.

Paul
 >> Stay informed about: Interesting AGP warning LED problem 

kimiraikkonen wrote:

>
> Confusing than you guess beleive
>
> Until now, i had two determinations about the AGP led situation.
>
> Currently it lits if:
>
> 1-No AGP card is installed. And it does its job, you cannot power up
> system and behaves as if there's a card on the slot, actually there's
> no card. Weird.
> 2-Correct AGP card installed(sometimes) and, sometimes after some
> computer operation or if you touch the card slightly during powered-
> on.

The circuit needs two inputs. One is TYPEDET#, to sense whether the
card is an illegal 3.3V one or not. But the other signal, I never
traced. Somehow, the circuit senses whether an AGP card is installed.
It almost sounds like that input could be malfunctioning, and
controlling the circuit more than it should.

Remember, that his circuit is based on simple transistors and
resistors, An incorrect voltage somewhere could upset the bias
and so on. It is not like a lot of the other stuff on the motherboard,
running on pure logic levels. It is an analog circuit.

The circuit must be running off +5VSB, because otherwise it would
not be able to gate off the PS_ON# signal to the ATX power supply.
This is a partial block diagram. On my motherboard, the transistors
were near the AGP slot. The transistors are tiny (SOT-23 ?).

http://www.national.com/images/pkg/mf03a.jpg

+5VSB
|
+------+-----+ +--------+
TYPEDET# ---->| Transistor | | PS_ON# |
| Circuit |------->| logic |-----> PS_ON#
CARD_PRESENT ? ---->| | | | on main
+------------+ +--------+ ATX power
connector

Paul
 >> Stay informed about: Interesting AGP warning LED problem