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Power Supply Problem

Posted on 2004-11-25
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Last Modified: 2010-04-26
My friend is at my place, we are lanning. His computer was on, working fine. All of a sudden it just turned off. His side case fan was still on, but everything else was off. My computer was fine. He tried to turn it back on, but it just wouldn't.

We smelt a burning smell and feared the worst. We removed the PSU and plugged all internal & external cables in again to check for loose/out cables. This still didn't fix the problem.

The PSU is relatively new - only a few months old. What could have happened? btw, it is a hot day today - over 30 degrees C (converted to almost 90 degrees in F), could overheating be the problem?
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Question by:Kane00
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tapkep earned 150 total points
ID: 12679214
If you smelt something burned - it means that something has burned :)
Try to to locate, which part has burn marks (I suspect PSU - you usually have to open it to see any damage). If PSU was defective, it can cause problems even if it was relatively new.

You can also replace PSU with good one and see, if computer will boot. Take care, if computer is made by DELL - they use non standard PSUs (although connectors are identical with ordinary ATX). You can damage 'standard ATX PSU', if you connect it to DELL motherboard (and vice versa).
It can be overheating problem, too - depends on your computer configuration.
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Author Comment

by:Kane00
ID: 12679223
He doesn't want to open the PSU because it will void warranty. It is still fresh.
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Expert Comment

by:tapkep
ID: 12679538
Can you replace PSU with good one?
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Author Comment

by:Kane00
ID: 12680046
The problem is, we don't have any spares to try it on.
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Expert Comment

by:tapkep
ID: 12680089
"My friend is at my place, we are lanning." I thought, that there were 2 computers at your place - your friend's and yours.
If you are not sure how to swap PSUs - you should bring friend's computer to local dealer (you mentioned, that PSU is still in warranty).

Could you write short specifications of both computers?
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Author Comment

by:Kane00
ID: 12680620
Don't worry about that. Its not worth swapping PSUs at the current time. btw, I know how to do it, I've built multiple computers, so I have plenty of knowledge on swapping them around ;P

Both are AMD 64 3000+, 1GB DDR3200 RAM, X800 Pro, mine is 400W PSU, friend's is 450W, both X-Blade cases.
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Expert Comment

by:tapkep
ID: 12680775
OK then :)
If you can't check PSU right now - inspect motherboard, videocard for burned parts. Removing heatsink from CPU probably is bad idea, if you don't have acetone (for cleaning ond thermal compound) and fresh thermal compound.

I would check PSU first, though. BTW, if your computer does not turn on after a while - either problem is not related to overheating, or some part was damaged.
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Author Comment

by:Kane00
ID: 12684809
I did a little test, and found out that the PSU is fine. Therefore, its NOT PSU related.. I assume it would be either the mobo or CPU... any ideas?

We took the CPU out, and discovered it has numerous bent pins...........................
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Expert Comment

by:tapkep
ID: 12691293
Interesting... How it could function at all?
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Author Comment

by:Kane00
ID: 12692516
Well never mind about the problem. My friend is going to swap the parts today.
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