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Possible Power supply problem

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by okippiko

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The computer is a P4,winxp,256 ram with a 300 watt ATX power supply.
I've been having trouble shutting down the computer through the normal shutdown process.
Now the computer shows no sign of power at all when I try to boot it up.. The processor fan and LED llights wont't even come on.
Could this be a power supply problem or MB? Any help will be appreciated. Thanks.

Len Piko - okippiko@msn.com

5 replies

by ann777

Does the power supply fan come on? If yes, then you probably have a systemboard problem. If no, then replace the power supply.

The shutdown problem is probably related to software. Depending on your version of Windows, see:

http://www.aumha.org/a/shutdown.htm

by dpalsen

The fan may still not come on, even with MoBo problems. I'd say try a new power supply first, however, since that's the cheaper part. HOWEVER, before doing that, check to make sure the power switch cable is plugged into the Motherboard. There's asmall wire running from the power switch to the motherboard that's a power control. It's the first thing, and probably the easiest to check. beyond that, if a power supply doesn't solve your problem, it's almost definitely the Motherboard.

On aside note, however, I've seen systems where the Power Supply simply didn't have enough oomph to drive the system and all connected disk drives. First you might want to disconnect everything but the motherboard in case a drive is shorting it out.

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