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Computer powers on for split second then turns off...

post #1 of 2
Thread Starter 
Ok for some context, this system is not the one in my sig. It's actually a newer build from about two years ago:

Mobo: Asus 1155 P8Z68-V
CPU: Intel i5 2500K
GPU: GTX 580 x2
PSU: Corsair AX 850

So for the last week or so, the computer had been freezing up (not responding at all then screen suddenly turns black but no BSOD) approximately every hour and sometimes less than that even when doing normal web browsing and nothing intensive. I was not OC'ing my system, and I had already tried resetting the CMOS to no avail. I also tried using just one stick of ram (I have two 4gbs) in each slot to see if it was a memory problem, but I was still freezing up.

So per usual I would manually shut down and boot up again, only this time it would only boot up for a split second then shut down. Subsequent pushes of the power button yielded no boot up at all, although I would get the normal split second boot up after removing the power plug for a short while.

I should have come on here earlier to ask why my computer was freezing up in the first place, but now that the computer won't boot at all I'm wondering if this was truly a motherboard issue all along or a PSU problem?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 Gigabyte USB 3.0 ATI 5770 4gb DDR3 
Hard DriveMonitorPowerCase
Western Digital Black 1TB Samsung P2770H Corsair 400W Antec 300 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 750 Gigabyte USB 3.0 ATI 5770 4gb DDR3 
Hard DriveMonitorPowerCase
Western Digital Black 1TB Samsung P2770H Corsair 400W Antec 300 
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post #2 of 2
Did you try only one stick, or did you also try the other ram stick? if not, try that.

Do you have a spare psu?`if so, try using it.

If that don't help, try removing ALL unnecessary components (just remove cables, no need to take out from the case), eg. all HDDs/SSDs, graphics card, basically all but the mobo, cpu, cpu cooler and one stick of ram, and see if you get anything. if still nothing, try to boot without ram, to see if you get some error code (beep or something).

Remove the PSU, and try to jump start it with a paperclip (or something electrically conductive), more info here if you are not familiar with the procedure. If you cant get the psu running with this trick, it's almost certainly a PSU problem. In case your PSU starts passive, eg. the fan starts spinning only after enough load/heat, you need to either use a multimeter to measure the voltage coming out, or if you don't have one, you can try connecting a fan to the psu, to see if the PSU powers the fan.

If the psu works with this trick, its not 100% certain that the psu is fully working, I had one PSU die on me so, that it was able to power a couple of fans, but anything more demanding and it would stop, as if there were an overload. rolleyes.gif


These are, of course, some things to try. I just woke up so I'm not sure if I remember all tricks, but I hope someone else can come up with more testing ideas, if these don't help.
Minimachine
(9 items)
 
  
CPUMotherboardGraphicsRAM
i7-5775C Asus Maximus VII Impact EVGA GTX1080 Founders edition 2x8GB Kingston HyperX 1600Mhz 
Hard DriveMonitorPowerCase
Samsung 950 PRO 512GB M.2 NVMe 3x Asus PB287Q 4k Silverstone 600W Strider SFX NCASE M1 Rev 2 
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Minimachine
(9 items)
 
  
CPUMotherboardGraphicsRAM
i7-5775C Asus Maximus VII Impact EVGA GTX1080 Founders edition 2x8GB Kingston HyperX 1600Mhz 
Hard DriveMonitorPowerCase
Samsung 950 PRO 512GB M.2 NVMe 3x Asus PB287Q 4k Silverstone 600W Strider SFX NCASE M1 Rev 2 
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