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Master
979 Answers
- Posted on Oct 28, 2009
Re: No power when press the button, power plug is good?
Good day sir/ma'am, chances are that your power supply box is the faulty part. But to make sure let us test your power supply box. here are the steps:
- PC is off, open the side panels of the CPU, disconnect the 20(or 24) pin molex connector from the motherboard.
- Get a piece of jumper wire, about 4 inches and splice the ends.
- On the molex connector, locate the green wire, then using the jumper wire, short it with the black wire (there are lots of black wires there).
- look at the exhaust fan, at this point it should be spinning (good). if not here are the other possible outcome: (1) the fan did not spin. replace the power supply box with a new one. (2) the fan spins momentarily then stops, this condition only occur once. Its either your power supply has no load (intermittent symptoms), or the switching controller stage part is faulty. Better buy a new one than have a headache. (3) blows a fuse. replace the entire box.
If you have a good power supply, install it on your CPU and test.
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