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No Power

By drd3 ·
I have an older NEC pc that no longer
powers up. When I press the power button no lights go on. I'm wondering if its the power supply or if anyone else has ever seen this. Thanks in advance!

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No Power

by cd In reply to No Power

If the power cord is OK and well connected to the PC, and if the power plug is OK, there is a great chance for the PC power source to be the cause of that mess. Good luck!

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by drd3 In reply to No Power

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by danpiers In reply to No Power

It probably is the power supply, but there are some quick tests that you might want to do, before writing it off.
First, turn off the power. Then, use a small screwdriver and see if the power supply fan spins freely. If it doesn't, the power supply has probably overheated and failed. End of discussion.
If the fan does spin freely, disconnect the power supply from the motherboard and everything else (drives, tape units, etc.), except for one harddisk. Power up the unit, and if the fan in the power supply starts spinning, the problem was in one of the components you just disconnected. You will have to reconnect each component, one at a time, until you find the failed device. If the power supply fan did not spin, turn off the power again and try a different hard drive, or a floppy drive. Power it up again. If the power supply fan still doesn't start, the power supply has most likey failed. End of discussion, again.
If the power supply fan starts this time, the problemwas probably a failed harddisk.
When reconnecting components, start with the motherboard alone, with all cards and memory removed. Good luck.

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by drd3 In reply to No Power

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by sparent In reply to No Power

If the power button is part of the power supply (the switch would usually be located near the back, where the power supply is) then your power supply is likely the culprit.

Most machines now, though, have the power button at the front. That means, that something has to move your button pushing all the way back to your power supply. Many of them have a solid rod that simply pushes back into the power supply. Open up your machine and check that the rod is not off kilt!

Good luck!

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by drd3 In reply to No Power

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by donmars In reply to No Power

Try holding the power button down for 5 to 8 seconds. If that does not work disconnect the power plug from the hard drive and cd rom and try again. If it works in either of these scenarios then it is not the P/S but one of the components such as hard drive etc thats causing a problem.

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by drd3 In reply to No Power

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by drd3 In reply to No Power

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