Sam Goldwasser wrote:

"tempus fugit" writes:


Hey all;

A friend handed me her dead computer to see if I could get it up and
running. When you turn it on, nothing happens. No lights, no fans, nothing.
So, I figure it's either the power supply or the motherboard (at least).

I want to test the PS first, before just replacing it. It is an ATX 300w
supply. I connected an 8 ohm 10W resistor from red (+5v) to black (ground)
and turned it on, but nothing happened. I then turned it on and shorted the
green wire to ground, but still nothing. Can I assume the PS is dead, or is
there something else I should be doing?

Thanks


That should do it assuming your AC power is present.

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Not on an ATX supply. The PS won't powerup unless the motherboard
signals the everything is good first. You have to ground the green wire
in the ATX connector.