computer won't turn on
Posted 16 June 2008 - 09:28 PM
Posted 17 June 2008 - 03:55 PM
There is nothing to fix, just swap the power supply unit out with a new one.
Posted 17 June 2008 - 04:05 PM
It sounds like your PSU is toast but there is a simple way to check for basic PSU function. Please follow these instructions exactly:
Disconnect the power lead from the computer then open up the computer case.
Unplug the main (20 pin) ATX power connector from the motherboard. This will be the large white rectangular plastic connector with lots of different coloured wires going in to it.
Next, disconnect the 12V ATX connector from the motherboard. This is a square 4 wire connector (2 yellow, 2 black) that plugs into the motherboard close to the cpu.
Find a bare metal paper clip & straighten it out (or use a piece of wire of similar length & thickness). Once straightened, bend the wire into a narrow U shape.
Plug the external power lead into the rear of the computer. If the power supply has it's own power switch on the back, make sure this is turned on.
Take the large 20 pin ATX connector & locate the green wire. This should be pin 14 in the diagram below:
Insert one end of the paper clip into pin 14. Make sure the paper clip is pushed up far enough into the connector to hold it in place, then insert the other end into any of the positions that have black wires. (I usually choose pin 16 or 17 for this).
As soon as both ends of the wire are firmly inserted, the PSU should power itself on (i.e the power supply's fan should kick in). If it doesn't, it's toast.
Posted 18 June 2008 - 09:28 PM
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