PC turning off on its own on start up

Associate
Joined
25 Aug 2006
Posts
57
Location
Wirral
Hi

my pc today started doing strange things

it was fine up till last night when this morning I tried to turn it on, but blue screened when starting windows,when 4 coloured flags appear, this led to think it was graphics card, however changing it for another didnt solve anything, so i tried removing ram, this didnt solve it however bios recognised 4gig when i had 6 gig installed. So then I tried Memtest and all was well, even recognised 6 gig.

A friend said try clean install of win 7 64, so i did, this solved problem, but after doing a burn in test pc crashed and pc said 1 disk may have a problem.

So I installed on a fresh WD old style hdd and all was well, but omg old hdd suck compared to raid 0 ssd :p,

Through all this the pc was at start up, powering up then after 1-2 seconds powering down, then up and down then finally staying on and loading windows fine. I have never seen this before, any ideas, i think 1 or both ssd's maybe knackered and its still only recognising 4gig installed and it is 64 bit win 7. Also reseated cpu and fan

see this short video

http://www.youtube.com/watch?v=lc2E7deiyqA&feature=g-upl
 
Associate
Joined
24 May 2009
Posts
323
Location
Southampton
Have you tried a different PSU ? You might have a defective one or it could be on its way out. Otherwise check there is nothing shorting out on the case - motherboard correctly installed etc...
 
Associate
OP
Joined
25 Aug 2006
Posts
57
Location
Wirral
Will try different psu today..pc has been sat in same place for last 2 years with no probs, and psu only 6 months old, hopefully not a short, if it was would it just simply not boot up at all?

It was also over clocked to 4ghz very stable for just over 2 years until 2 months ago when bios said overclocking failed..could this be a sign of failing mobo?
 
Associate
Joined
24 May 2009
Posts
323
Location
Southampton
Will try different psu today..pc has been sat in same place for last 2 years with no probs, and psu only 6 months old, hopefully not a short, if it was would it just simply not boot up at all?

It was also over clocked to 4ghz very stable for just over 2 years until 2 months ago when bios said overclocking failed..could this be a sign of failing mobo?

Did you try a different PSU today - any difference? If not....

Have you tried resetting your BIOS - taking the CMOS battery out for a while and putting back, shorting the pins etc? You could try updating your BIOS too to see if this makes any difference - DO NOT do this through a Windows program - found this out a couple of years ago where the update failed and I had to send my mobo off to a specialist to be reprogrammed!
 
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