PC shuts down on it's own

I have an AMD 2,6ghz
1 gig ram
2 x 120gb IBM set as master, 200gb maxtor set as slave
LG DVD-RW GSA-4120

400w power supply
MSI motherboard

System was working fine, detached the 200gb hard drive, to take it with
me on vacation...now when i try to reattach it system boots up..then
powers off on it's own.

I unattached the dvd-rw when trying to get the system to reconize the
hdd, now when i attach the dvd-rw, same thing as the hard drive boots
up then powers off, sometimes boots into window's xp, as soon as i
insert a dvd-rw, system shuts down, same as the hdd, sometimes
reconizes it but when i access it system shuts down!!!

All the jumpers are in place, everything is set as master or slave the
way it supposed to be.............
could this be the motherboard or power supply problem????

Thanx


--
Rockjock

Classic example of why responsible computer manufacturers
provide comprehensive hardware diagnostics, for free, on their
web site and sometimes on the hard drive. If your computer
manufacturer is not so responsible, then get those diagnostics
from the component vendors. IOW first verify hardware works
without Windows. Once that has been demonstrated (and power
supply system has been proven reliable as discussed in " My
computer shutdown itself !!!!" in alt.comp.hardware), only
then move on to important information in Windows such as
history from the system (event) log and hardware in Device
Manager.

Rockjock wrote:
 > I have an AMD 2,6ghz
 > 1 gig ram
 > 2 x 120gb IBM set as master, 200gb maxtor set as slave
 > LG DVD-RW GSA-4120
 >
 > 400w power supply
 > MSI motherboard
 >
 > System was working fine, detached the 200gb hard drive, to take it with
 > me on vacation...now when i try to reattach it system boots up..then
 > powers off on it's own.
 >
 > I unattached the dvd-rw when trying to get the system to reconize the
 > hdd, now when i attach the dvd-rw, same thing as the hard drive boots
 > up then powers off, sometimes boots into window's xp, as soon as i
 > insert a dvd-rw, system shuts down, same as the hdd, sometimes
 > reconizes it but when i access it system shuts down!!!
 >
 > All the jumpers are in place, everything is set as master or slave the
 > way it supposed to be.............
 > could this be the motherboard or power supply problem????
 >
 > Thanx
 >
 > --
 > Rockjock