System powers down after post

Tarfu · Jan 8, 2014

System won't stay powered up. Replaced ps, MLB swapped out memory, disconnected drives, cleared CMOS and when system starts up, can enter setup before system powers down again. Only thing I haven't replaced is CPU.

alexoiu · Jan 8, 2014

It might be a heating issue. Try cleaning te old paste, reapply new one and reinstall the heatsink.

Tarfu · Jan 8, 2014

Cleaned all paste off both processor and cooler. This ame thing was happening before which is why thought was ps or MLB. Even replaced video card

alexoiu · Jan 8, 2014

It could be the CPU then.

Tarfu · Jan 8, 2014

Darn was afraid you say that. 8x aren't cheap

alexoiu · Jan 8, 2014

Isn't it under warranty? Have you OC-ed it?

Tarfu · Jan 8, 2014

Built this system from scratch year or so, long past Frys warranty,but will dig out paperwork just in case it's a year warranty. Oh well

Tarfu · Jan 9, 2014

And yes I had pushed it 'a little'... But since I can't get into CMOS to redo it all, will removing the battery for a while reset it all back to default? At this point am removing all fans but collet on CPU to see if there's a short.

alexoiu · Jan 9, 2014

You can try removing the CMOS battery for a minute (power cord unplugged). It would reset the BIOS, yes.

Tradesman1 · Jan 9, 2014

Is it only coming on for a few seconds or whatever? Since you say you've replaced most all, might be something with a mobo short, might try building on a bench, have a guide that might help here:

http://www.tomshardware.com/faq/id-1753671/bench-troubleshooting.html

Tarfu · Jan 9, 2014

Grrrrrr. Ok cleared CMOS, disconnected all fans except one on CPU cooler, replaced CPU with known good one from friends unit, disconnected all drives, voted to CMOS and set default, rebooted to boot screen waited and about 45 secs till system shut down. MLB shorting out in case?

Tarfu · Jan 9, 2014

Thanks for the link. Went through everything one at time with MLB out of case. Booting up and even running windows repair. Will see how long it runs. So now, how do you insulate MLB from case shorting it out?

Y0GI · Jan 9, 2014

Thanks for the link. Went through everything one at time with MLB out of case. Booting up and even running windows repair. Will see how long it runs. So now, how do you insulate MLB from case shorting it out?

That is what the case to MB stand-offs are for.

Yogi

Tarfu · Jan 9, 2014

Standoffs have been installed since the get go. Will check the screws for CPU cooler and see if going through and touching back or something

Tradesman1 · Jan 9, 2014

and make sure the ONLY standoffs are those that line up with the mounting holes in the mobo

Tarfu · Jan 10, 2014

Tried everything, well almost, and still got shutdown. Desperate, I took off the corsair chip cooler (one that has a water cooled radiator looking component) and put on a regular heat dispenser type. No issues. Put MLB back into case, no issues. Just out of curiosity, put back the 8x CPU and system ran fine. Figures was the least expensive component that caused it (after buying everything else-thank god didn't buy new CPU yet). Thanks guys for all the help and advice!

Tradesman1 · Jan 10, 2014

Glad to hear all is well

System powers down after post

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