Possible PSU problem?

bignev72

bignev72

bignev72

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Joined
22 Mar 2012
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1,161
Hi Guys,

This is a bit of a strange one.

My machine will power on fine however if I have my PC on for a long time and then turn it off. It won't boot up again.

It appears to power up (everything spinning etc - no beeps) but there is no output to the screen. Sometimes if I turn it off and then on again it will then power up normally straight away but generally it just does the same thing. If I then leave it for about 15-30 minutes it will turn on fine.

When the machine is on it works fine and I can restart. This is just a problem with cold booting.

It's not a major problem because normally when I turn my machine off I am finished with it for the day. But sometimes if I forget to do something and immediately try to turn it back on it can be annoying.

Does it sound like a PSU problem to you?
 
I doubt it's the PSU. It could be a couple of things. Overheating maybe the culprit. Is your PC dusty inside ? Are all the fans running ?

I would monitor your temps just to make sure it's not a heat problem.

I'm not saying it's not the PSU, it's just that PSU's tend to simply die rather than drop off slowly.
 
Sliver said:
I doubt it's the PSU. It could be a couple of things. Overheating maybe the culprit. Is your PC dusty inside ? Are all the fans running ?

I would monitor your temps just to make sure it's not a heat problem.

I'm not saying it's not the PSU, it's just that PSU's tend to simply die rather than drop off slowly.
Click to expand...

My machine runs between 40-60C so hot but not overheating I would say. Surely if it was overheating it would hang but it doesn't. It runs fine.

It's not dusty inside and all the fans are running.
 
Ok. Well you could monitor your PSU voltages to see if the rails are pumping out enough voltage. It is possible that one of your rails is undervolting.

I would check Event Viewer too, just to see what is being reported.
 
Sliver said:
Ok. Well you could monitor your PSU voltages to see if the rails are pumping out enough voltage. It is possible that one of your rails is undervolting.

I would check Event Viewer too, just to see what is being reported.
Click to expand...

So I need to get a multimeter then to do this?
 
Personally I would avoid software for checking voltages, they are often way out.

If you can get hold of multimeter this would be a much better way of checking.
 
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