Question about Compaq (243890-001) 250-Watt Power Supply
WHEN I SWITCH IT ON IT IS NOT POWERING UP,I CHECK THE FUSE,RECTIFIER AND THE SWITCHING TRANSISTOR ARE ALL OK.PLEASE HELP.
Check the power cable/cord for continuity with your multimeter ok. Make sure also that the mains or power outlet is giving the right voltage. This is also done by the use of the multimeter - either analog or digital - any one at your disposal can do ok. if all work well, then the power supply unit should be removed from the system unit, connected directly with the power cord and then bridged. That is at the secondary output which connects to the system motheboard. Locate the power-on cable(normally green in colour) and bridge it with any black cable on the same row. The cooling fan at the back of the power unit should be rolling if the unit is ok. Good luck
Posted on Jun 03, 2009
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Posted on Jan 02, 2017
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