laptop won't boot. weird problem.

I hope I don't make this long...

My laptop diedf on me a few months ago. It was running nicely and then
it hanged, so I powered it off, and it wouldn't start again. i.e I
wld switch on the laptop, the harddisk could be heard spinning, any cd
in the cdrom would spin nicely, but the screen wld remain blank, hard-
disk light showed no activity

Sparing you all the details.. I tried everything(ram,cleared the bois,
cleaned the mobo, external monitor) and concluded that the problem was
with the motherboard.

after 2 months (2 weeks ago), I started it up and and behold! it was
working. I switched it off again(to attach the Harddisk), restarted
and it wldn't work again.. So I again disassembled it and
reassembled it and this time it started worked for good.

But yesterday I attached a usb to ps2 connector and bam, it hanged.
and again there is the same problem..

Now my question is
WTF?????
surely the mobo is not fried since it worked nicely for 2 weeks
what can I do more?? and what cld be possibly wrong here?
A guy did check the mobo with a volt meter and concluded that he will
have to check it furthur at the service center..

Thank you

On Mon, 28 Jan 2008 06:33:38 -0800 (PST), testingagain.RemoveThis@gmail.com
wrote:

>I hope I don't make this long...
>
>My laptop diedf on me a few months ago. It was running nicely and then
>it hanged, so I powered it off, and it wouldn't start again. i.e I
>wld switch on the laptop, the harddisk could be heard spinning, any cd
>in the cdrom would spin nicely, but the screen wld remain blank, hard-
>disk light showed no activity
>
>Sparing you all the details.. I tried everything(ram,cleared the bois,
>cleaned the mobo, external monitor) and concluded that the problem was
>with the motherboard.
>
>after 2 months (2 weeks ago), I started it up and and behold! it was
>working. I switched it off again(to attach the Harddisk), restarted
>and it wldn't work again.. So I again disassembled it and
>reassembled it and this time it started worked for good.
>
>But yesterday I attached a usb to ps2 connector and bam, it hanged.
>and again there is the same problem..
>
>Now my question is
>WTF?????
>surely the mobo is not fried since it worked nicely for 2 weeks
>what can I do more?? and what cld be possibly wrong here?
>A guy did check the mobo with a volt meter and concluded that he will
>have to check it furthur at the service center..
>
>Thank you

I remember a laptop given to me a few years ago for checking, which
sounded to be in a similar state. When powered on you could hear the
Hard Drive spin and then it would shut down.

Researching suggested that there was a short somewhere with a contact
on the motherboard being the culprit. I could start it if I physically
tried to bend the whole laptop.

Taking it apart didn't reveal the root cause but I was pretty sure
that somewhere a screw or connection was shorting. In the end I
couldn't remedy it other than the bending method which only solved it
for a few more sessions before giving up altogether.

km