PC turns off suddenly

GodAtum · 23 Oct 2012 at 10:34

My PC has been working fine but since last night it turns off every time I try to turn it on. It get up to the Windows boot screen or sometimes I can log-on then turns off suddenly. I have not done anything with it so I cant see what the problem is :confused:

Specs:
i7 920
Asus P6T
9GB Corsair RAM
Be Quiet Dark Power Pro 750W
WD Raptor 300GB
Windows 7 Ultimate

wazza300 · 23 Oct 2012 at 10:37

What amount of CPU/vtt you using? And dram voltage?

GodAtum · 23 Oct 2012 at 10:39

Just the stock, I'm not overclocking.

wazza300 · 23 Oct 2012 at 10:41

Try with just one memory stick installed,with 9gb you might need atleast 1.35v CPU IMC voltage

Leeroy123 · 23 Oct 2012 at 10:42

Check there isnt a loose cable, or a cable getting stuck in a fan, or something like that.

GodAtum · 23 Oct 2012 at 10:43

wazza300 said:
Try with just one memory stick installed,with 9gb you might need atleast 1.35v CPU IMC voltage

But it was working before so I dont see how that could change?

wazza300 · 23 Oct 2012 at 10:45

Could be anything,usually when it freezes or suddenly shuts off its memory related so you need to figure out if it is or not by testing with one ram stick then repeat with the other sticks,could be psu also,could pop out the mb battery for 30mins to fully clear cmos and try,it will reset the BIOS settings though

Admiral Huddy · 23 Oct 2012 at 10:49

Use memtest86+ to verify the memory is operative. Try using one memory stick at a time and try the single sticks in different slots. If one stick of memory fails in all slots, then its almost certainly a RAM problem. If the working RAM stick works in one slot but not another, then this is certainly going to be an memory controller problem which is integrated on the CPU (IMC). Your only testing the RAM here so don't worry about dual or triple channel memory for the test.

Check that the memory is set correctly i.e. Frequency, VDIMM and latency timings. Check the manufacturers website for details.

If your memory looks ok, then you may need to check your PSU:

http://www.huddysworld.co.uk/index....rdware/91-hoe-to-check-if-your-psu-is-working

If you can boot into your system via safe mode, then take a good look at the system dump and Event Manager for clues. Event manager is often overlooked and under estimated. Whislt in safe mode, disable any startup programs that maybe be causing problems on normal boot.

GodAtum · 23 Oct 2012 at 10:57

Ok I'll give memtest a try.

How do i get memtest onto CD as I have only 1 PC (the one thats turns off!)?

wazza300 · 23 Oct 2012 at 11:21

i think you can run it from a usb stick,if not try and get it stable by just using one ram stick,it might not lock up

GodAtum · 24 Oct 2012 at 10:37

Hi all, I opened my case and checked all the cables and components which were fine. Then I turned it on and it stayed on! How odd.

wazza300 · 24 Oct 2012 at 11:00

GodAtum said:
Hi all, I opened my case and checked all the cables and components which were fine. Then I turned it on and it stayed on! How odd.

could have been a loose cable?

shotgunshand · 24 Oct 2012 at 13:06

GodAtum said:
Hi all, I opened my case and checked all the cables and components which were fine. Then I turned it on and it stayed on! How odd.

Yeah I had a similar issue recently. Probably something making things short and opening the case could have moved the cable or whatever to stop it. Pain in the butt issues like this.

GodAtum · 24 Oct 2012 at 13:12

I'm going to run memtest just in case anyway.