At 6:06 PM -0500 2/22/06, Chris Placzek wrote:
One way to test the PS would be to make sure everything is plugged in
properly, turn it on, and use a voltmeter to test the voltages coming
out of one of the molex power connectors. Yellow should read 12V and
red 5V. Thats really the least thorough way. I think, but am not sure,
the proper way would be to unhook the motherboard, short out the green
and a black wire to start it up, keeping it shorted, then testing out
the voltages of the motherboard connector. You could just use one
ground, and you probably dont have to test multiple of the same color wire.
I wouldn't test any computer power supply without a load on it. I
inadvertently fired up a C610 PS without it being plugged into the
logic board and blew the PS. I even knew this was a possibility, I'd
just missed the power connector.
Some switching supplies simply need a load attached or they burn out.
Generally the only way to find out is the hard way.
It's better to test the PS with the logic board connected. You
should see +5, +12 and +3.3V at least, -5, -12 and +24 are also
possible. You should see one of those voltages on each lead of the
PS with the exception of the black wires and one other (the start
line.
Anyway after checking the PS I would check the CPU connector. If that
looks good check the PCI and RAM slots (even the ones with cards in
them). Also any other connectors (airport, modem, ATA). If those look
good I would look over the whole board (top and bottom) for missing
resistors or other types of damage, or shorts. If one of those isn't
your problem, then I would say the board is damaged beyond repair.
Chris P
R. A. Cantrell wrote on 2/22/06, 5:28 AM:
> on 2/22/06 1:02 AM, Chris Placzek at [EMAIL PROTECTED] wrote:
>
> > Or
> > did you buy it dead?
> I got it dead. It had been working daily in a graphics studio, and no one
> there got inside it.
Try cleaning the logic board with 90% IPA. Sometimes when a computer
gets stored (if that's the case) it can get coated with gunk.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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