Dead CPU?

[deshepherd]

Came home tonight to find the PC my children play on (plus we use to check email etc) was dead ... turns on but while all fans spin up no display and no beeps from speaker. My wife said she turned it on earlier in the day and got the normal mboard boot screen but it then went blank and have ahd no display since.

Initial thought was gfx card (and "elderly" 3850) ahd died but trying it in another PC found it works (sad ... I wouldn't have minded having to replace that).

So this probably means its cpu or mboard .... any way (other than swapping CPU which I'd like to avoid) to eliminate on or the other?

N.b. when I opened the PC up I found that the intake fan (and the gfx cooler) were clogged with dust which may have affected internal temps (though as cpu was a lowish spec athlon x2 which was not oc-ed its not like I was trying to cook it).

 

[deshepherd]

Thanks for the inputs ... I'll have a go with the PSU from another PC ... the PSU is a Corsair VX-450 which when I got it seemed to have a good reputation (and I'd assumed would be much more durable than the "<another retailer> value specials" that I'd had before!).

 

[deshepherd]

Thanks for the inputs ... I'll have a go with the PSU from another PC

Pulled PSU out of other PC and connected up mboard and gfx power, pressed the on switch and got the mboard boot splash screen ... so it looks like a dead PSU (hmm, so much for my idea I was investing in a quality branded PSU a couple of years ago!)

I know I'm in the wrong forum but any recommendations on a cheapish PSU - the OcUK crusade one look suitable - would probably get 650W and put that in my main PC and move the 500W OCZ one from there down to this 2nd PC

 

[deshepherd]

Sorry to resurrect this again (plus its now definitely not a CPU issue so its the wrong forum) but over the weekend was preparing to make an RMA request to Corsair and to make sure I'd covered all the things to check first I reset the CMOS on the mboard, powered up the PC .... and it booted.

So positive news is the problem seems to be fixed ... but I'm now confused as to why. Situations is

1) PC refused to boot/POST with the Corsair PSU
2) when I plugged in another PSU it did
3) Plugging Corsair back in again it still did nothing
4) when I then reset CMOS it booted (?I think I reset CMOS - jumper actually only mentions resetting RTC but I could find no other jumper that would reset CMOS).

Anyone hazard a guess as to what happened - I could believe there could be a problem it the CMOS/RAM got scrambled - but that doesn't explain why it worked with a different PSU without clearing the CMOS/RAM