I just posted this in the Windows Vista NG, but then realized that I might have a better chance here. =================================================================== Family members HP Compaq/Older Athlon X2 just went belly-up. Only sign of life is a single green led glowing on the mobo: no power supply fan, no CPU fan, no response to DVD drive's eject button... First thought was power supply, but when I swapped in a known good power supply, no change. Then I figured "Maybe the on/off switch"... so I pulled out the switch and used a knife to jumper the two leads coming into it - figuring that would duplicate the action of the switch... but no luck there either. Unless somebody has a better idea, next thing I am going to do is to revisit the power supply and verify correct voltage on each output lead.

If the power supply fan ain't running, it's likely somewhere in that path. Pull the power cable and short the "on" pin to ground. will show you which pin that is for your particular configuration. If the PS fan runs, start from the switch and check all the connections down to the header. Not much you can do in between. I had a system similar to that. Power switch didn't work. Grounding the pin brought up the PS. That path goes thru one of the huge glue chips on a multilayer board that's impossible to debug. Nothing but the chip in the path.

HP Compaq: DOA - Obvious Things To Check?

Mar 13, 2016 22 Replies

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bob_villain 10 years ago

...long time ago, '96 thru '00. Too many people bitched!

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gfretwell 10 years ago

It is true, I have one in my junk box. Fortunately they got the green wire off of pin 14 so it wouldn't power up and blow anything either way.

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clare 10 years ago

Acer has done it on their latest machines - 12 pin power plug from PS to MOBO.

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