Explain this one...

[coolermaster]

A desktop PC.

You press the power button.

Nothing at all happens.

Leave it a couple of hours. It turns on perfectly.

I have never understood this phenomena...have you ever comes across this...what causes it?

 

[nickbits]

Are you pressing the power button again or it just turns on by itself? My guess is something to do with bad capacitors.

 

[coolermaster]

Problem: You have a desktop PC that does not turn on when the power button is pushed. No fans. No LEDs on mobo. Then after a couple of hours the power button would be pressed and the PC turns on.

 

[Stoneburner]

NExt time it doesn't turn on, remove the power button connector from the MOBO and start it with a screw driver. IF it turns on without issue, then your power button is screwy.

 

[coolermaster]

how do you start a PC with a screwdriver?

 

[UNhooked]

how do you start a PC with a screwdriver?

Short the two PW pins on the mobo

You can even use a shunt/jumper to do so.

 

[Prey2big]

This exact phenomena have occurred many times throughout my ~15 years with several computers. (and friends computers too)

I have noticed this happening most of the times after moving the PC. For example moving it from or to a LAN-party. And I think it has to do with temperatures from being out-doors etc.
It has also happened a few times after trying to boot the PC while having left the windows open for several hours.

 

[Charlie98]

PSU tripped out? ...or thermally tripped?

 

[coolermaster]

could be the PSU...I am not sure

I have seen this happen so many PCs and I've never found the root-cause

 

[nightspydk]

I hate to admit it, but I have a system like that to. But with mine it's not a power issue, it somehow there is no connection to the screen. Y'know orange led. So I turn it of and on and voila full contact.

I always attributed that to the system personality get me.

 

[styrafoam]

Another thing to try- pull the power cable from the back of the pc and let it sit for a few minutes, reconnect and try again. Usually caused by a faulty power supply.

 

[TY-1]

What hardware are you running on that you have this issue? Motherboard, Case, PSU, etc.?

 

[tweakboy]

Seems like its the PSU. When did thish problem start ? Did it ever work properly ? gl

 

[coolermaster]

This is not a specific issue.

It is just a problem I have seen common to SOME desktop PCs.

 

[IntelEnthusiast]

Most of the time when have seen this it has ended up being a power supply issue. Try the screw driver to start it but after that see if you can barrrow someones PSU and try it with a replacement PSU.

 

[Rifter]

Most of the time when have seen this it has ended up being a power supply issue. Try the screw driver to start it but after that see if you can barrrow someones PSU and try it with a replacement PSU.

I agree with Mr Intel on this one, I used to be a computer tech for a living and delt with this dozens of time and 90%+ of the time it turned out to either be a PSU issue or a grounding issue.