Hi, i was wondering if someone could help me. I was playing a game when my pc randomly shutdown for no reason and now everytime i turn it on it shuts its self down. I can conclude that there is nothing overheating, iv had a fan blowing cool air on the hardware in my case. I really dont know what could be the problem.
The motherboard might have developed 'expanding capacitor syndrome'. Look at the motherboard, look for any capacitors that are less cylindrical or leaking.
What is your PSU, and the rest of your spec? I had similar problems with a no brand PSU, replaced it with a half decent one and that sorted it.
Agreed. Going by the symptoms the 1'st thing I would have checked is the PSU. Its worth giving the mob a good looking over as well though.
Well heres my spec: Mobo: Gigabyte p55m-ud2 Memory: G.Skill 4GB DDR3 1333mhz PSU: Corsair HX750w (i only got this about 2 month ago) Graphics card: Nvidia GTX 470 point of view Ultra Charged CPU: Intel i5 750 CPU Cooler: Corsair H70 Hard Drive: Western Digital Caviar Black 1TB As far as i can see on the mobo all the capacitors are in shape and non leaked
When does it shut itself down? Is it getting past POST, entering Windows and then falling over, or is it immediately switching itself off?
I dont have a spare PSU to test. As for the shutting down, it just shuts down randomly at different times, theres no set time it shuts down. Last night it stayed on long enough for me to do a memory test with Memtest 86, there was no errors.
That's what I was going to suggest doing... Since the memory is okay look at other common problems that can cause shutdown. You've already mentioned overheating in the original post, and pretty much all the replies highlight the PSU as a possible culprit. If you are positive that nothing is overheating then you do need to test with another PSU. Perhaps you know someone who can lend you one?
My old memory passed memtest no problems, but still wouldn't boot into windows. the memory diagnostics built into windows 7 and vista picked up on the memory errors that memtest didn't.
Definatly sounds like an iffy psu, though if it is only 2 months old it shouldn't be causing issues. But it's not unheard of. Is there anyone you can borrow a psu from? Also is the system overclocked? If it is try putting it back to default settings.
I'd recommend taking all the non essential things out of the PC, switch to onboard graphics e.c.t and see what happens. Also, unplug all peripherals except keyboard and mouse. If it's still the same, you'll need another psu to test with.
The system is not overclocked its on stock speeds. I dont know anyone i can lend a PSU off. I i am positive that its not overheating because everything is cool. I dont understand how it could be the PSU causing my problems though. Just to let you know iv had it running without it shutting down for the past 30-40 mins.
I had a system do this once. It would sometimes reset several times a day and at other times would run fine for several days. I put up with it for a couple months till I could upgrade. Low and behold replacing the psu fixed it. I later tried the (old) psu in another system and it had gone to silicon heaven. Good job I upgraded when I did. Anyways try doing what kidmod suggested.
When your in Windows try running Prime 95 and Furmark at the same time, if your system frezzes or shutdowns then it's probably the PSU. and while doing those tests cheak the Voltages.
If your motherboard has a voltage monitor that runs in Windows, cheak the voltages, then when running prime and furmark cheak if the voltages drop down below the min range, and when stopping Prime and furmark cheak if the voltages go over the max range in the table below. Code: Supply [V] Tolerance Range (min. to max.) Ripple (p. to p. max.) +5 VDC ±5% (±0.25 V) +4.75 V to +5.25 V 50 mV −5 VDC ±10% (±0.50 V) –4.50 V to –5.50 V 50 mV +12 VDC ±5% (±0.60 V) +11.40 V to +12.60 V 120 mV −12 VDC ±10% (±1.2 V) –10.8 V to –13.2 V 120 mV +3.3 VDC ±5% (±0.165 V) +3.135 V to +3.465 V 50 mV +5 VSB ±5% (±0.25 V) +4.75 V to +5.25 V 50 mV The table will show up better at Wikipedia. http://en.wikipedia.org/wiki/ATX#Power_supply
bear in mind that they aren't always very accurate, CPIUID's hardware monitor says that my 12v rail is running on 0.09v, and yet it's perfectly stable.
I think the problem could by hard drive failure, iv got my old hard drive which i know works and im using that and my pc hasnt shut its self down yet and iv had it running for about 2 hours 30 mins
