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PC will not power up. PSU failure?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - PC will not power up. PSU failure?

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van___   05-21-2009 at 07:47:51 AM

hi,
my mates computer wouldnt turn on this afternoon, when you turn it on the cpu and side fans etc begin to spin for a fraction of a second and stop and nothing happens. Have tried starting with all drives unplugged and video adapter removed. checked all connections to mobo and used 2 different wall outlet cables. So far no progress.
Apparently earlier today the computer turned off twice randomly during the day and when he turned it on again it went fine but now it wont start at all.

Any ideas? Im thinking power supply failure. Any suggestions appreciated.

Thanks
Vance


Message edited by van___ on 05-21-2009 at 07:48:36 AM
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mi1ez   05-21-2009 at 09:39:12 AM
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I'm thinking PSU too. Do you have a second to test with? have you tried jump starting the PSU alone?

Reply to mi1ez
zipzoomflyhigh   05-21-2009 at 04:05:46 PM
- 0 +

Most likely psu, have you had any lightning lately?

Smell the back of the psu and see if theres a burnt smell.

------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
van___   05-22-2009 at 12:26:57 AM
- 0 +

no lightning pretty sure. I will test with mine if i have to as we dont have a spare. How do you mean jump starting the psu alone? How would one do that?

Reply to van___
Bronze CPUs badge jsc   05-22-2009 at 03:47:34 AM
- 0 +

Disconnect the main plug from the motherboard. Put a paperclip jumper from the green wire to either black wire beside it. The PSU fan should spin up. This does not necessarily mean that the PSU is good, because the fan represents only a minimal load. But if the fan does not spin, the PSU is certainly bad.

Reply to jsc
zipzoomflyhigh   05-22-2009 at 01:32:05 PM
- 0 +

Did you smell it?

------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
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