Problem with older PC - won't post - no beeps

[corpfan1]

Having a problem with older PC and need some help with diagnosis.

1. About 6 days ago, the PC stopped booting/posting.

2. When power is pressed, the fans come on as do lights etc...but it doesn't post and there are no beeps. Monitor doesn't get any signal.

3. Tried some things including:

a) Replacing memory with old sticks that I had.

b) Trying 1 stick in all 4 slots and then trying another in all 4 slots.

c) Remove all memory (machine doesn't post, but I do hear 1 long and 2 short beeps in this scenario).

d) Remove AGP video card (machine doesn't post, but do hear 2 short beeps in this scenario).

e) Disconnected hard drive (no change in symptoms).

f) Cleared CMOS and removed battery (no change in symptoms).


Any ideas here?

Could it be the PSU?...I don't think it is...but who knows? I am leaning towards fried video card or problem with motherboard.

Motherboard is a P4P800 SE and BIOS is AMI I believe.

Thanks for any troubleshooting ideas in advance!

 

[Miker2k]

You'd get beeps if the vid card was bad like you do when you pull it.

Check the PS connections to the motherboard, both of them (if applicable to your board). Could also be a CPU problem.

 

[corpfan1]

The computer hasn't been opened in a few years, nor moved, etc...

What could have happened to the CPU? Do they fail overnight?

Anything else to try?

Wondering if there is any point in even trying to replace parts 1 piece at a time as PC is about 6-7 years old.