Come back off Hols and PC won't boot. No Post, just on then off.

David_VI

David_VI

David_VI

Associate
Joined
8 Feb 2011
Posts
1,767
Location
Colchester
This is one of my worst nightmares.
I just came back from 3 days away and my PC appears dead. It was working the day I left!

I press the power button and the fans spin for about 1 second then off again. It continues to repeat this endlessly. On then off, on then off. No beeps.

Specs as in sig (Seems not)
i5 2500k
Gigabyte P67A UD4
670GTX Windforce
2X 4gb Ripjaws Ram
Coolermaster Silent Pro 850w
Antec Kuhler 620


I've tried taking ram and GPU out. No change.

Please help I am bored to hell!
 
Last edited:
You may have had a surge in the power lines whilst you were away.

However this is unlikely as the PC was turned off. Try clearing the CMOS (take battery out and put back in) and see if that helps.
 
Savan_P said:
You may have had a surge in the power lines whilst you were away.

However this is unlikely as the PC was turned off. Try clearing the CMOS (take battery out and put back in) and see if that helps.
Click to expand...

The power was off at the wall.. Would a surge still get through?
 
A video. The odd noise is the Kuhler because the rad is lower.

A messed up power button wouldn't do this would it? The button sticks sometimes, i've fiddled with it and it seems to be normal though.
 
This happened to me twice in three years. Exact same situation - plugged in, but power off. For me it was over a period of one week away. And exact same issue - about one second of fans spinning and then nothing.

Utterly deflating, isn't it?

In both cases replacing the PSU resolved the problem, but both times I wasted a lot of time diagnosing the fault. After the second time I bought a PSU tester (fairly cheap one), that lets you know straight off if it is the PSU at fault.
 
Oh! Updated original post with specs.

Something odd I just noticed on my board.
On the 24Pin PSU connector, the black lead on the additional part is like it has been cut.

Also on the motherboard it looks like a capacitor is missing. Now this makes no sense as I don't know what would remove a cap and sheer that lead.. Is it meant to be that way?

https://lh4.googleusercontent.com/-...AAAAHPI/OObrNtXDy74/w335-h595-no/DSC_0115.JPG
Just left of where it says ERP is a marking and two pieces where it looks like a cap should be.

https://lh6.googleusercontent.com/-...AAAAHPU/dR_ta-0PKTA/w958-h539-no/DSC_0116.JPG
Can see what looks like a cut black cable.

If these are the cause, it's unexplainable, how would a cable get cut and a cap become removed when I haven't looked in the case for months aswell as there being no cap or part of a cable in the case.
 
Last edited:
look inside the case,if the cap got knocked off it will be inside

and not sure if a cap should be there or its a voltage read point? idk

cant see your black cut wire tho
 
Look to the right of the '24' on the edge of the plug, I don't believe that can be the problem as it's cut the other end also. I believe its the GND lead, so maybe it wasn't there to begin with?!

I've compared with photos of the board and there appears to be a cap there. It doesn't explain it though, it wouldn't just drop off on its own..

Not sure what to do next!
 
mice maybe? nibbled wire/knocked off a cap?

you can pick spare caps up and get pc repair shop to solder one on for you,or contact gigabyte they should solder one on for you no sweat

as for psu maybe try with another?

EDIT: try different psu first,board might work fine even with a missing cap,just depends if its an important one or not
 
Last edited:
wazza300 said:
mice maybe? nibbled wire/knocked off a cap?

you can pick spare caps up and get pc repair shop to solder one on for you,or contact gigabyte they should solder one on for you no sweat

as for psu maybe try with another?
Click to expand...

Mice?! I don't know how they'd get in the case..

I don't have any spare PSU's or any money till payday to purchase one. No further ideas?
 
im just thinking what would do the damage with no one being there

the 24 pin splits into a 4 pin and a 20 pin plug,the cut black wire lookslike its on the 4pin part so unplg it and try booting with just the 20pin connector

it should work/run fine just with that (the board can run on either a 20 or 24pin plug)
 
wazza300 said:
im just thinking what would do the damage with no one being there
Click to expand...

Mice can fit through a hole the diameter of a pencil. As for a power surge, that can occur even if the PC is powered off, as long as it's plugged in. Any plug, including the network cable if the router is left plugged in or the monitor cables if your monitor is left plugged in. You've got to completely unplug it to protect it.
 
Quartz said:
Looking at the board on Gigabyte's page, you're definitely missing that capacitor.
Click to expand...

Yeah I looked at photos and noticed too. It doesn't make sense though!

Quartz said:
Mice can fit through a hole the diameter of a pencil. As for a power surge, that can occur even if the PC is powered off, as long as it's plugged in. Any plug, including the network cable if the router is left plugged in or the monitor cables if your monitor is left plugged in. You've got to completely unplug it to protect it.
Click to expand...

Well I suppose I should check if all my dwarf hamsters are accounted for :\ not sure how they'd climb my PC case and go for a capacitor high up.
 
wazza300 said:
:eek:

seemslike you found the cause? did it get out?
Click to expand...

Nope it was in its house, it had made a hole it couldn't get through and was trapped.. what a horrific death.

Anyway I've got the mobo out, just PSU attached and still same. So probably Mobo or PSU?

Anyone spec a mobo for my i5 2500k? OCUK doesn't seem to have many 1155 mobos :\
Need at least 6x Sata ports.
 
You must log in or register to reply here.
Back
Top Bottom