I have a AMD based system that's been causing me alot grief.
The system configuration is the following:
Athlon XP 1800
Asus Nforce 2 motherboard
512 MB generic ram, a single stick
Antec true 330 W PS & Case combo
ATI Radeon 7500
WD Caviar 80GB
Pioneer DVD ROM 8x
everything else is onboard
Not too long ago it was working fine (over period of months+), but recently when I try to turn it on, it would froze at the POST screen that display all the connected devices and etc.. I have to try to reset it couple of times and it'll eventually boot into Windows, which then detects bad sector and I had to use the system CD to fix it. So far I know once it passed that stage, I can leave the system on for days, playing games or run applications and it won't have a problem. I can also reboot the system once it's already up and running and it won't have any problem. However, when I power off the system, then turn it on this entire cycle will repeat again.
Initially I thought it might be the hard disk's problem, so I swapped from WD to a Maxtor disk but same problem persist. Both hds were tested on another older system and is healthy. When I remove the hard disk from the unstable system, it would past the POST screen fine and ask me for a boot disk and which it should. Once the system managed to boot into windows, sometimes the DVD ROM would stall while running CD. All the peripherals were detected fine in the BIOS.
Any ideas what might cause this instability? Thx.