PC randomly turning off.

PixelChef · 16 Oct 2011 at 14:10

Hi,

Today my PC has been randomly turning off, it doesn't shut down, just instantly turns off. The last time it happened 5 mins after turning it on, time before that was about 20-30 mins. This has never happened before.

- Nothing is overclocked
- It's not overheating, I checked temps

The only thing I can think of is last night for uTorrent I selected the option to shut down after downloads were complete, but when I woke up the PC was off and the downloads were at 0% still after turning it back on. Might be an error with that.

I uninstalled uTorrent, but it's still happening. Any other ideas what it could be?

RJC · 16 Oct 2011 at 14:17

Checked all electrical connections on the board.

What is the full spec of the pc including PSU, also what are the temps.

PixelChef · 16 Oct 2011 at 14:46

RJC said:
Checked all electrical connections on the board.

What is the full spec of the pc including PSU, also what are the temps.

I just checked all the connections they seem fine. Spec is:

i5 760
GTX 470
ASUS P7P55D-E
Kingston HyperX Genesis Grey 8GB DDR3
OCZ GameXStream 700w
Windows 7 64 bit

Temps are about 40c

The PSU is about 4-5 years old? Could be dying?

tidusjar · 16 Oct 2011 at 17:53

Is there any distinct noises coming from your PSU? Whistling/High pitched?

PixelChef · 16 Oct 2011 at 18:00

tidusjar said:
Is there any distinct noises coming from your PSU? Whistling/High pitched?

No nothing out of the ordinary. It hasn't happened for hours now, since I checked the cables and cleaned a bit of dust, it might be fixed by either the dusting, cables, or being disconnected from power for ~10 mins.

Still suspicious of the PSU though.

I also think it could be something to do with the hard drive, because I checked the system logs and saw a few errors that occured today with the following message: "The driver detected a controller error on \Device\Harddisk1\DR1." but I've run HD Tune error test and it came up with nothing.. hmm.

But here's hoping it was just some dust or a loose connection.

tidusjar · 16 Oct 2011 at 18:16

could have been something loose on the PSU or maybe the mobo circuiting on your case?

PixelChef · 18 Oct 2011 at 19:52

ok the problem isn't fixed.

I thought it was the CPU overheating because I did a Prime95 test and it went to around 90c and then I stopped it and a few seconds after that it shutdown. So I ordered a new CPU cooler because I'm using stock at the moment.

But I don't think it's the CPU temp anymore. It just happened again multiple times. After the first time I turned the PC back on and monitored the CPU temp and it was at about 60c and it happened again.

Any other ideas? This is getting annoying now. It happened 3 times in a row shortly after rebooting, it will probably happen again very soon. Temps still around 60c.

edit: now 40c at idle.