Dead mobo or CPU?

July 20, 2011 at 22:52:46
Specs: XP, Socket 754
Ok so not long ago my friend's computer was getting hot because it would randomly shut off and I measured the temps and they were 80C or so. So I cleaned it out, and when i put it back together i made the mistake of aligning the corner of the cpu with the wrong corner, and because some pins dropped in place I completely didn't realize they weren't all in.

After troubleshooting it a bit, I realized I had the cpu on wrong, placed it in correctly and the computer turned on. Now, a week or 1.5 weeks later, my friend says the computer won't even turn on. He brought it over.

The fans spin up and everything but no video. I put the video card on another motherboard and it works fine. I tried taking out one memory module here and there but still no luck. Power supply tested fine and I even used a different one.

So now I'm thinking it's the motherboard or cpu, unfortunately we don't have the same cpu type to try so how can we determine if its the motherboard or cpu before purchasing a different one?

The fans and everything spin up. No beep at all unless I unplug the video card then I hear a long beep. Any ideas?

See More: Dead mobo or CPU?

Report •

July 20, 2011 at 23:34:45
Try to start the system without memory(make sure the mobo speaker is plugged in), if system beeps there's big % cpu is working.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.

Report •

July 21, 2011 at 00:55:56
System will not beep with memory out. It will beep if power is unplugged from video card though.

Oh wait.. speaker wasn't plugged in so i'll try. I hear a sound even when speaker isnt plugged in with the vid card power not connected, though

Report •

July 21, 2011 at 05:07:18
"i made the mistake of aligning the corner of the cpu with the wrong corner, and because some pins dropped in place I completely didn't realize they weren't all in"

The CPU socket is know as a ZIF socket, ZIF = Zero Insertion Force. If the CPU is postioned the right way, it will just drop into place with little or no pressure. A CPU can only fit ONE WAY in a socket. If you had it positioned the wrong way, you should have known it because it will NOT fit. So for you to get it to sit flush in the socket, you must have had to force it in place. There's no way that you didn't damage some of the pins when you did that, so that means you had to to straighten those bent pins out. Did you leave that part out of your explanation?

"Oh wait.. speaker wasn't plugged in"

The beeping comes from motherboard - either from a speaker built onto the board or from a speaker in the case that's connected to the board. The beep code tells you what's wrong. The fact that there's beeping at all is a good indication that the board & CPU are probably still OK. It would help to list the make/model of the board, CPU, RAM, video card, PSU, etc. so that we don't have to guess what you're working with. And we need to know the beep code.

Report •

Related Solutions

July 21, 2011 at 10:46:34
I didn't leave out anything. I know it's a zero insertion force slot and when I positioned it the wrong way I did not force it in, only a few of the pins dropped in place but if you had seen it it would look like it had dropped in just fine upon first impression. So there are no bent pins.

This is a K8N Neo V2.0 motherboard. I'd have to clean off the cpu's thermal paste to see if I can make out a model.

I've taken out the whole motherboard, re-connected the CPU, heatsink/fan, video card, and just 1 memory module and it still does not show anything on screen.

Report •

July 21, 2011 at 11:03:16
Ok, I unplugged both memory modules, plugged in the SPEAKER connector for the case, turned everything on and no beeps whatsoever.

So in summary:

If video card is disconnected from power supply: 1 long constant beep
If memory modules are disconnected from motherboard and everything else plugged in: no beeps

EDIT: Chip is an Athlon 64 3200+

Report •

Ask Question