PC failing to turn on, mobo or cpu at fault?

emchrism

emchrism

emchrism

Associate
Joined
1 Oct 2008
Posts
14
Hello all,

I hope this is appropriate forum (apologies if not) and was hoping for some advice on troubleshooting if its my motherboard or cpu that is at fault.

I bought components from overclockers last Jul for my PC which has been running great. However it failed to turn on the other day, when pressing power on button nothing happened, complete silence, no psu or fans kicking in, no video display on the monitor and no beeps.

So I tested the Corsair PSU with a paper clip and it powered on no problem. I tried powering on the motherboard manually with a ball point pen in case power button has failed but that didn't work either.

So I contacted Gigabyte who responded with the below troubleshooting tips. I've worked my way through the list apart from the last step regarding using a new CPU:

"Remove the board out of the chassis/case and test on bench.

Please make sure 4/8pin 12v connector and MB 20/24 pin connector are both plugged; just install cpu , video card , single stick memory ( on slot 1 which is close to cpu ) and pc speaker ,turn system on if no video display comes up check error beep code :

-one long continue beep, it means memory can't pass bios check, try re-install memory or try other brand name memory,

- 3 beeps or 2 long and 8 short beeps then 2 then 1, it means video card can't pass bios check, try re-install video card firmly or try other video card

- no beep at all, try remove the memory with out memory turn system on check if any beeping signal ,

-without memory still no beeping signal symptom tells either motherboard or cpu is defective, test cpu in other system or test with an other known good cpu to confirm defective motherboard."

I don't have a spare CPU to test on this motherboard or another spare PC available to test the CPU.

Is there any way of ascertaining if it is the CPU or motherboard at fault other than purchasing another CPU or Motherboard?

Any questions, suggestions or comments welcome

Kind Regards

-------------------------------------------------------------------------------
Model Name : GA-P35-DS3L(rev. 2.0)
--------------------------
M/B Rev : 2.0
BIOS Ver : Unknown
Serial No. : 081140011078
Purchase Dealer : www.overclockers.co.uk
-------------------------------------------------------------------------------
VGA Brand : ATi Model : hd4850
CPU Brand : Intel Model : Intel Core 2 Duo E7200 Speed : 2.53Ghz
Operation System : Vista 64-bit SP : 1
Memory Brand :G Skill Type : DDRII
Memory Size : 4Gb Speed : PC2 6400
Power Supply : 750 W
 
If there is no power at all it's either the motherboard or psu nothing else. So getting another psu would be the easiest option. Even though you have tested the psu with a paperclip I have still have experienced a psu working this way but not when connected to a motherboard.
 
bobbydigital said:
If there is no power at all it's either the motherboard or psu nothing else. So getting another psu would be the easiest option. Even though you have tested the psu with a paperclip I have still have experienced a psu working this way but not when connected to a motherboard.
Click to expand...

This, I had a customers machine yesterday in fact that would turn on and power with the old paperclip trick but would not successfully power the whole pc.
 
Thanks for prompt responses and advice.

I'll pick up another PSU later today and see how that goes, failing that I'll remove CPU and see what happens.

Many Thanks
 
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