PC no longer booting

Spinal2k2 · 7 Feb 2015 at 12:18

Went to turn the PC on before and although everything switches on fans spin up etc, I got no display. Switched it off and tried again. Opened the case and noticed on the motherboard the CPU_LED was red.

Tried making sure all cables etc are plugged in but I still get the same problem.

system is the following
ASUS M5A97 Evo rev 2
AMD FX8320
Avexir 8th
Power color radeon 270
Corsair cx500m psu

System has never been overclocke, it was working fine last night with no signs of any problems

stulid · 7 Feb 2015 at 12:21

Try disconnecting all the drives attached.

Use a single RAM stick at a time.

See if it will then at least enter the BIOS.

There is also a memOK button on the board that maybe worth pressing.

Spinal2k2 · 7 Feb 2015 at 12:29

Just tried the above, still get the same no display and the red cpu led on.

stulid · 7 Feb 2015 at 12:31

Try power off, clearCMOS (take the battery out) then refitting and powering on.

Spinal2k2 · 7 Feb 2015 at 12:43

Still getting the same problem after removing the battery.

stulid · 7 Feb 2015 at 12:45

Do you have access to another PC to try swapping bits over?

Spinal2k2 · 7 Feb 2015 at 12:48

I still have my older PC but thats an intel system

stulid · 7 Feb 2015 at 12:53

If you can try the PSU+gfx card from it and maybe ram, then that leaves CPU or board at fault and most likely the board.

Spinal2k2 · 7 Feb 2015 at 13:00

I will try the PSU & Gfx card from the other PC. Not sure if i will be able to try the ram as i think its DDR2.

Will let you know how i get on with it, thank you for the help

Spinal2k2 · 7 Feb 2015 at 15:05

Quick update, tried the PSU from my other PC and get the same problem CPU_LED lit up red.

handsomejesus · 7 Feb 2015 at 17:57

If clearing CMOS and trying a different PSU didn't work, seems like socked/CPU issue.. Try re-seating the CPU maybe

Did you update your BIOS recently?

Spinal2k2 · 7 Feb 2015 at 18:47

Ive not done any bios updates to it, i also tried taking the CPU out of the socket and putting it back in and still get the same problem.

At the min, i have all the cables etc disconnected from it, ive also removed the motherboard battery to leave it over night, i cant think of anything else to try.

stulid · 7 Feb 2015 at 18:55

The 8pin ATX is fully connected?

Spinal2k2 · 7 Feb 2015 at 19:10

all cables are fully connected, went through them all unplugging and plugging them back in etc.

handsomejesus · 8 Feb 2015 at 00:28

Well, you could maybe test with different RAM, otherwise CPU/socket is faulty..

Testing the CPU in another board would be good.

Spinal2k2 · 8 Feb 2015 at 16:32

Update on this.

Had more time today to fully check and recheck things, swapping parts etc.

Tried the Corsair PSU in my other PC - and that wont boot.

Put the PSU from the other PC into this PC - this time it started to boot (thinking about it, yesterday i was in a bit of a rush when i was testing i pos didnt have everything connected corectly.

put the old corsair PSU back in and it fails to boot.

got the other PCs psu back in now and im using the PC to post this.

So it looks like its some sort of fault with the corsair psu. it under 1 year old so ive sent a webnote to ocuk to see what they say.

handsomejesus · 8 Feb 2015 at 16:47

So the CPU wasn't getting the power it needed, glad you got it all worked out