Diagnose fault

bbK · 15 Apr 2016 at 13:54

Hi

I was playing The Division last night when my PC just instantly shut off, no BSOD or anything just instantly boom, turned off. I tried turning it back on and the fans would spin up, but the PC would again shut off within 1 second.

So far I've tried:
re-seating the CPU
Different RAM/different slots/1stick/no ram (still turns off)
Using on board graphics

I fired up the pc with no CPU in it and it doesn't instantly shut off but I dont know if thats a good test or not....

Specs:
Intel Core i5-4690K
MSI Z97M
G.Skill TridentX 8GB
GTX 970

Any help appreciated.

bbK · 15 Apr 2016 at 14:03

CPU would go to max 50 during a session of the Division.

Specs:
Intel Core i5-4690K
MSI Z97M
G.Skill TridentX 8GB
GTX 970

bbK · 15 Apr 2016 at 14:33

Danny75 said:
Remove the GPU. Use onboard graphics.

Done that - same issue.

bbK · 15 Apr 2016 at 14:44

Ok, will order a PSU now and see if that fixes it.

Cheers for the responses.

bbK · 15 Apr 2016 at 14:49

Actually I have a Corsair CX 500w in this spare PC - would that be sufficient to use/test?

bbK · 15 Apr 2016 at 15:50

There wasn't actually a boom sound i just added that for effect.

I just connected the 24 pin and 8 pin power supply cables from this machines PSU to the faulty system and I'm getting the same thing, fans spin up and the system just shuts off.

bbK · 15 Apr 2016 at 16:08

howiepoohs said:
As it made a "boom" sound, I would suggest a PSU failure although they usually make a loud "crack" noise.

No "boom" sound could also indicate PSU failure. Try the PSU test.

Done the PSU test with a paperclip and it spins up fine.

bbK · 15 Apr 2016 at 16:12

I didnt connect the GPU.

bbK · 15 Apr 2016 at 16:50

At this point I'm thinking its the motherboard so I have gone ahead and ordered one.

bbK · 17 Apr 2016 at 16:07

Quick update

Tried the new motherboard - same thing fans spin but turns off after 1 sec

changed the h100i back to my h100 - same thing

Tried the 500w PSU thats in the machine im on right now and it did the same thing.

at this point im out of ideas.

bbK · 17 Apr 2016 at 16:14

I think i will retest the spare 500w PSU just in case then go from there.

bbK · 17 Apr 2016 at 16:53

joeyjojo said:
Strange. You assembling it on a tabletop or in the case?

Sounds like the only thing you haven't tried is the CPU...

Originally was all in case - but now that i changed literally everything its half in the case and half hanging out... lol

Ye CPU is literally the only thing I haven't tried, would a CPU failure potentially be causing this? I'm guessing so as im literally out of ideas on what else it could be.

Again, thanks for all the responses thus far.

EDIT1 Just tried the spare PSU again - same thing happening.
EDIT2 Ordered CPU - its the only thing left to try.

bbK · 19 Apr 2016 at 16:39

I went ahead an ordered a CPU - finally arrived and indeed that WAS the issue, all fixed now.

Cheers for all the advice guys.

bbK · 19 Apr 2016 at 21:09

It was running @ 4.4 its entire life, stock volts IIRC, once I had overclocked it i left it (not rly much of a tweaker when it comes to overclocking.) Purchase date was October 2014 and yes I am going to RMA it.