PC Suddenly Not Posting

Swinbag

Swinbag

Swinbag

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Joined
30 Nov 2008
Posts
1,276
Hi all,

Posting this as a sanity check as much as anything, be good to get some opinions/ make sure I haven't missed anything obvious.

5800x3d
MSI MEG X570 Unify
2x16GB Team Group DDR4
ASUS RTX 4070 Ti Super
Seasonic GX-650
Samsung 990 Pro & 970 Evo

PC has been working fine, no recent changes and I was playing games Saturday without issue - shut it down gracefully as normal.

Come Sunday it powers up but with no display output:

- The 'VGA' light is lit on the motherboard EZ Debug screen, manual states "indicates GPU is not detected or fail".
- Showing a 'b6' debug code, manual states "Clean-up of NVRAM".

I've tried the following so far:

1. Cleared the CMOS (using the dedicated button & jumper pins).
2. Replaced CMOS battery
3. Removed RAM and installed one stick at a time in each slot.
4. Tested with spare known-working RAM.
5. Re-seated GFX card - checked pins on each end of the power cable and PSU/ GFX card connectors.
6. Tested with a spare known-working GPU (3070)
7. Removed CPU and checked socket/ pins for obvious damage.
8. Tested with a spare known-working CPU (5600x).
9. Tried booting with both SSDs removed.

I feel like I've exhausted all my options here and I'm leaning towards a dead motherboard, which would be a shame as it's obviously well out of warranty.

Any other ideas?
 
freddie64 said:
Have you got another PSU to try?

Wonder if flashing bios will help? (using flashback button)
Click to expand...
No spare PSU unfortunately - tempted to order one from the rainforest to test before I go looking at replacement mobo's.

Tried the BIOS flashback - seemed to work but still get the same error when trying to boot up again.
 
Thanks for the suggestions all, I stopped recieving notifications for replies so missed a load.

Tried with one DIMM of spare known working ram in each slot with no change.

Unfortunately no friends locally with spares so have ordered a psu from the rainforest to test and rule out - will just return it if no joy.

Definitely feels like a dead motherboard which is a first for me in personal rigs - been wanting to downsize to SFF for a while so may try to grab an mATX x570 or B550 board, would love to go AM5 but can't make that work at the moment.
 
Gave the new PSU a go, not luck unfortunately.

Also tried the GPU in another pci slot as a hail mary - time to accept defeat and start looking at motherboards.

Thanks for the help & suggestions all.
 
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