PC issues

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15 Apr 2008
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I have a PC that I can't figure out what the issue is. Its a LG115 era i3, that won't boot.

I left it for a month and it worked again for a month. Then this week it won't boot again. Same symptoms as last time I turn it on and fans spin hard drive spins, no beeps, but nothing on screen (Keyboard does not light up on boot) I left off over weekend it booted once then fails to boot again now.

I stripped everything out, reseated CPU, unplugged ram, changed power supply, tried booting with only CPU and one ram stick, nothing works. The only thing that seems to do anything is to leave it totally off for a random period of time and magically it works again for a random time then fails again.

Really lost on whats wrong, Thinking it's either the CPU or the MB but I don't have a LG115 MB or processor to test them against.
Any ideas?
 
Leaving the problem isn't going to make the problem go away like drying out your damp clothes. You've done a great job of eliminated everything but the said CPU and motherboard but you've already said you get no POST beep which you'd get with a failed CPU, RAM and GPU for that matter.

Check first that nothing is shorting the CP pins and check the chassis switch too. These can become a little troublesome over a lonf period time when start your PC with hammer. You can eliminate the chassis by shorting the PWR pins with a flat headed screwdriver.If this all works then you've found the culprit.

Otherwise my guess it's either the VRMs have blown or there's a short somewhere. Either way, I think you need to be replacing the motherboard.
 
Thanks for the answers, it's using onboard graphics, I did try VGA card and that didn't work.
I think it might be a short somewhere too, but why it seems to spring back into life when left for a while is a bit confusing if it's a short? I have motherboard out of case on a antistatic mat at the moment so can't be case?

I don't think Overclockers stock LG115 motherboards anymore?
 
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