Comments on: Troubleshooting an HP Power Supply

By: David Faustrum

David Faustrum — Sat, 06 Aug 2011 12:29:42 +0000

First I started to have trouble with my picture and then my computer would crash. Thought it was the graphics card but over night it would work fine for a couple of hours. It’s an Hp and the green light on the back is on and not blinking. Replaced power cord and worked for 2 days and now won’t turn on. Not sure if after market power supply’s will fit because they are all different sized and wanted something more powerful.

By: clarkent

clarkent — Sat, 16 Jul 2011 12:59:40 +0000

For some time after mains fail unable to power up, unless i temporaliy disconnect the cable from the PSU to the mother board. This has worked up till now, but not any longer, now Ive found if you do the PSU check by shorting out term 14 green wire with any ground wire, black, the fan on the PSU should start if OK, This test has been documneted in various tips, try this with the cable disconnected from the mother board firstly but dont leave to long as there could be a prob without any load on PSU.
If the mains goes off, I now short the wires as above with the cable plugged in, fan starts, I then press the normal on button, PC starts to powers up, remove short circuit and Im OK till next ,mains failure. Dont know how this works I gather its the failure of the start up signal to the PSU. Ive actually intercepted the green and black with two wires to go to a small switch so I can reset when the power gos off, Works for me

By: John

John — Sun, 10 Jul 2011 21:39:55 +0000

I have an HP m9040n. My power supply was blinking and clicking and the computer wouldn’t turn on. I opened it up and unplugged the motherboard from the PSU, and when I plugged the power supply into the wall the light became solid again. If I plug the motherboard into the PSU while it is still plugged into the wall, the light stays solid and the computer boots up fine. However, if I unplug and then replug the cable from the PSU, the light starts blinking and clicking again until I do the process over. Is this a problem with the PSU or the motherboard?

By: Dave

Dave — Wed, 07 Apr 2010 13:14:43 +0000

I could very well be running hot. I would invest in a can of compressed air and make sure all intake and exhaust grills and fans are clean. If you’re handy with computers, you can even open it up and give the CPU fan a quick shot with air. Depending on the location of the computer it might be dirty inside.

By: Sheryl Rogers

Sheryl Rogers — Tue, 06 Apr 2010 00:45:22 +0000

why does my hp computer sound like its running hot. every few minutes it sounds like a fan comes on and i’m not sure if the computer is ok or not. it runs fine.

By: Dave

Dave — Thu, 01 Apr 2010 19:06:14 +0000

Not so much the low voltage, but a spike after the brown-out could damage it, sure.

By: mike

mike — Thu, 01 Apr 2010 01:27:58 +0000

i have an hp 7011 series and the power supply burned out a week ago.. purchased a new one and that lasted three days. I did notice the lights dimming during the rainstorm.. would low voltage take it out?

By: Dave

Dave — Sat, 27 Mar 2010 20:11:25 +0000

It’s hard to say whether it’s the power button or not. It’s very unusual for a power button to fail. The light you see may indicate the power supply is good, but the problem could be a bad motherboard. You might want to have a local shop look at it. Or you can join our forums and we can try and help you troubleshoot it further.