Need help with trouble shooting a PC power failure

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Old 11-10-06, 08:50 AM
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Question Need help with trouble shooting a PC power failure

Hi all,
I have a PC that has stopped booting since a few days ago. I thought it must be the power supply as nothing happens when I push the on/off button. When I opened the panel, I noticed that while power is plugged in and turned on, I see a very smal light on the motherboard truning on, but nothing else is happening. Does this mean that power supply is OK?

What can I check next to figure out what the problem is?

Thanks a lot.
 
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Old 11-10-06, 08:53 AM
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Just because the little led on the board is on, doesn't mean the power supply is good. Here's what I need you to try:

Disconnect all cdroms, harddrives from the power supply

Remove RAMS chips

Try and turn on now. You will probably get some beeping, but if the boot screen comes up, that means you probably have a bad power supply.

If the boot screen comes up, install ONE ram chip, and start up. If system does not boot up, then you have a bad RAM chip. Do this with each component.
 
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Old 11-10-06, 09:08 AM
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Hi,
I did as you suggested, removed power from all components as removed the RAM as well. Turned the PC on, and there was nothing. No beeps, no sound of any kind!!!

ty...
 
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Old 11-10-06, 09:54 AM
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Simple way to check the power supply is to jumper it to make it turn on (assuming it's an ATX supply). Here's the procedure:

http://modtown.co.uk/mt/article2.php?id=psumod

Make sure everything is disconnected from the supply before starting.

I'm guessing you'll get nothing and the supply is bad
 
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Old 11-10-06, 10:27 AM
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I was able to follow the instruction provided and was able to get the PSU fan to come on and them DVD ROM and CD ROM...
 
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Old 11-10-06, 06:58 PM
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That unfortunatly doesn't mean the power supply is good. Only way to be sure is to swap in a different one and see what it does. I have had power supplies that test good with my 2 different testers, but don't actually work when installed in a PC.
If the psu is good, it is likely the motherboard that is bad.
 
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Old 11-10-06, 07:00 PM
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Originally Posted by HotinOKC
Just because the little led on the board is on, doesn't mean the power supply is good. Here's what I need you to try:

Disconnect all cdroms, harddrives from the power supply

Remove RAMS chips

Try and turn on now. You will probably get some beeping, but if the boot screen comes up, that means you probably have a bad power supply.

If the boot screen comes up, install ONE ram chip, and start up. If system does not boot up, then you have a bad RAM chip. Do this with each component.
You WILL NOT under any circumstances get any kind of display on the monitor if you power on a system with no RAM installed.
 
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Old 11-12-06, 09:08 AM
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Originally Posted by Davejb
You WILL NOT under any circumstances get any kind of display on the monitor if you power on a system with no RAM installed.

I know that, you will get beeps. He is getting nothing.
 
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Old 11-12-06, 10:33 AM
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But your statement "Remove RAMS chips Try and turn on now. You will probably get some beeping, but if the boot screen comes up, that means you probably have a bad power supply"
implies that your suggesting that it may happen, I'm just letting him know it will not happen.
 
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Old 11-13-06, 07:46 PM
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thanks everyone for your feedbacks.
It was the PSU, I got one from CompUSA with same attributes and system came right up with no problems.

Thanks again.
 
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