No signal to monitor after using the computer for a while??

[Bigmuresan]

Recently I have been having a problem with my computer.
After an hour or more of using it the signal to the monitor would disappear.
I try rebooting the machine and the signal doesnt come back.

About two days after this happened i turned on my machine and it was working fine and the same thing happened again.

After the signal disappears and i restart my computer no led's on the keyboard lit up but I can hear the hard drives clicking on.

I know the monitor is good cause it works when it is connected to another machine.

I have narrowed it down to either the motherboard or the processor or maybe something else i can not think off.

What should i check/replace???

Thanks for any help.

 

[Guest_imported]

From what you say, it appears to work from cold ok, so first check point should be to see if the processor is getting too hot, e.g. heatsink fan not turning, etc. Next check other fans in the machine, particularly the PSU extractor fan. Does the air exhausted from the PSU feel uncomfortably hot at the point at which you lose video? Does the video card get very hot? Some high end cards have a separate cooling fan attached - is this working ok? When you restart the machine, do you get any beep codes from the speaker? Try removing and reseating CPU, memory, video cards, etc.

Make sure "sleep mode" isn't being inadvertantly activated, if your machine has this facility.

Good luck!


ROGER - GØAOZ.

 

[Rhort]

I had this problem recently, and I traced it to an overheating video card in the end.

To get around it, I reslotted my PCI cards to place the video card "on the end", where the fan could actually get some cool air to drag over it.

That sorted it out instantly and I've had no further problems since.