PC not booting

blaaislaai

blaaislaai

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Hi

I have an Asus P8Z68V Motherboard, about 2 years old. 2x DDR3 1600mhz Corsair ram and a Sandy Bridge i5 2500k CPU; 850w superchannel PSU


This morning the PC refused to switch on. All fans and LED lights go on, but dies after a split second pressing the power button.

I have went through the process of elimination already:

1. Tested the PSU with paperclip trick and it turns on, even tested the PSU on another PC and works fine
2. I removed all connected peripherals(hard drives etc) leaving only the keyboard and mouse plugged in
3. Took the motherboard out from the chassis and turned it on, same issue.
4. Cleared the CMOS a few times (removing battery, setting jumper etc)

My conclusion here is, either the CPU or Motherboard is dead. How can I tell? Do not have another socket 1155 CPU/Motherboard to test on.

Any advice appreciated!
 
CPUs virtually never fail, so it's more than likely not your CPU. You should try a different PSU just in case, they can do funny things. Failing that, probably the mobo.
 
Most likely the motherboard but like postmanpot said try a other psu first, you will never know :?
 
Take out the ram modules and replace them one by one, testing as you go.
Failing that, check that your graphics card is seated correctly.

I had a similar issue and it turned out to be my graphics card that had shifted slightly over time.
 
The PSU works on a different PC, therefore not PSU related.
Also removed the RAM one by one, and had the same.
Tried to boot with onboard VGA, and had the same.

Most likely Motherboard, but could it be due to the CPU not seated properly? Not that I removed the CPU or anything. I think a re-seat is worth the try.

If all else fails, new motherboard I guess!
 
look for popped capacitors or blacked or broken chips, motherboards normally show the damage.
 
Give it a smell as well.
Even a slight burned smell is not good.
Capacitors become swollen when blown.
 
had the same problem like this and found that my memory gave me problems
 
ponder said:
That's no guarantee.
Click to expand...

+1
...remember...It might be that you have MORE devices on YOUR pc, than the OTHER guy...still sounds like a PSU to me though...

Unplug ALL devices....even your HDD....and see if you can get into the bios...(leave ONE ram in though...lol)

OOPS...looks like you ALREADY had only the m/board out and it still failed...(forget my above comments then)

What I have encountered before, was with an old Celeron cpu. I removed the chip...and then reassembled it...After that it worked like a bomb. IF by any chance ( what i have ALSO encountered ), is take OFF the cpu-fan and ALL other stuff. Put your finger on the cpu and feel if it gets hot...then quickly put the PSU off or just unplug it. Usually, if the cpu gets hot, its a m.board fault...if its cold...it "could" be the cpu...(although i would STILL try another PSU though...)
 
Last edited:
Remove the PSU cable that plugs into your motherboard, repeatedly press the power on button on your pc until everything is flushed, plug PSU cable back into motherboard and try to power on.
 
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