Thanks for replying guys. Ste, are the following what you're looking for? I hope that these info would help.
Specs:
230V PSU
Via P4M266A Chipset
Pentium 4 478-pin
512 MB DDR SDRAM
PCTel HSP56 PCI Modem
Geforce 2 MX400
Primary Master:Seagate ST340015A 40 GB HD
Secondary Master: Aopen CD-RW CRW4850
Secondary Slave:ATAPI CD-ROM 52 Max
1.44 Floppy disk drive
I recently changed to a 19" LCD monitor but the problem just started right after the power interruption. My sister was also playing Sims 2 that time when the power went off and the our lowly computer was using much of its resources.
Test:
When I say "ok" I mean that the computer was able to boot up to BIOS using the hardware. I did two attempts with each set of hardware. I cleared the CMOS again and powered off the computer for 15 minutes before doing this. The following are the results.
1. Memory stick, CPU, on-board video adapter-1st attempt ok-2nd attempt ok
2. PCI modem-ok-ok
3. AGP video card-ok-ok
4. Floppy drive-ok-ok
5. Primary master hard drive-ok-ok
6. Secondary master cdrom-ok-ok
7. Secondary slave cdrom-ok-ok
I did a 15 minute cooldown again after the test and the computer still booted ok after that.
Unfortunately, after closing the computer case, moving it to the computer table and plugging all external hardware the computer didn't boot to BIOS again so I tried loosening the monitor cable's attachment to the video card then it worked ok. Then, I played Warcraft 3 for an hour and tried to switch off and then back on the computer and the problem occured again. I tried replugging the monitor cable and now I'm typing this on the problematic computer.
Sorry, I really can't draw a conclusion for this. The problem is driving me crazy.