Jacques Clouseau wrote:
Hi. I'm helping someone with a Compaq Presario 5320US desktop that
won't power on at all. The problem occured when the PC was moved from
one room to another. A previous tech told the owner to just go buy a
standard 350 watt power supply (which she did) and that he'd then
install it. This happened, apparently, without the tech even
bothering to do any actual troubleshooting -- plus, he was also
apparently ignorant of the fact that this Presario uses a
non-standard proprietary power supply. The owner can't get ahold of
that guy now. So, the owner says to me: can you fix it?

I can't even plug in the replacement standard power supply because the
motherboard has a 24-pin connector instead of the standard 20-pin.
Similarly, I can't use my quick-and-easy power supply tester because
the old power supply won't plug into that. I'd go ahead and start
probing with a DMM for proper voltages, but I'm under the impression
that I'll get nowhere with that if the power supply isn't already on
and under load. Finally, without a known good power supply, I can't
even tell whether the power supply was actually the problem, or
whether it was instead something else.

Any suggestions as to how to proceed? I did come across a web site
that sells 24-pin to 20-pin adapters, but does anyone know whether
such adapters even have a standard wiring pattern? Since the Compaq
supply is non-standard, how would I know whether the adapter would be
wired properly for it?

I found that the customer can buy an exact replacement part from the
HP/Compaq web site for $150, but doing so seems silly before we even
know where the problem lies.

Any help appreciated!

Jacques

Is there an on/off switch on the back of the power supply?
Is the 110V/220V switch on the back of the power supply in the proper
postion?