Need help troubleshooting.

hd7950 · 9 Dec 2021 at 12:28

I was playing battlefield when my PC froze, I turned it off and after that it wouldn't display anything, not even the bios. I tried using different monitors, cables and put the GPU in another slot on the motherboard, still nothing.
The motherboard light indicated VGA.
I have an AMD CPU with no integrated graphics so I bought a GT730 to test it and the PC runs fine.
I thought the GPU was faulty so I returned it, it's been tested and is OK.

What is the diagnosis now, a bad power supply? It's an old XFX 850w that been in use since 2013.

Specs
TUF gaming x570 plus
AMD 5600x
2x8 GB
AMD RX 6800
XFX 850w XTS gold

mickyflinn · 9 Dec 2021 at 19:18

Would agree its Probablly the psu .

hd7950 · 11 Dec 2021 at 15:05

Ok so I bought a new PSU installed it and still have the same problem, no display and motherboard LED VGA card.
It's a 750w corsair PSU and I tried two cables to make sure the GPU was plugged in.
I only have one monitor with display port for testing, the card shouldn't display anything over HDMI without drivers. I can't imagine just the display port is broken on my monitor, it still doesn't explain the motherboard LED. I tried other monitors over HDMI originally when it had drivers and still got nothing. Could buy an adapter to rule that out?
When I install the GT730 the motherboard LED goes out.

So what's left now?
GPU tested by overclockers for 6 hours and works.
Brand new PSU.
bad motherboard?

mickyflinn · 11 Dec 2021 at 15:20

Things to try.

Try setting the gpu pcie 3 instead of auto in the bios.

Update the bios on the motherboard .

Try the second gpu slot on the motherboard.

hd7950 · 11 Dec 2021 at 15:32

Thanks I'll give that a go.

hd7950 · 11 Dec 2021 at 20:43

Thanks again, it seems to be working after updating the bios. WTF actually made it work, it doesn't make any sense to me? It was running perfectly for a year, then suddenly needed a bios update. Why did the other graphics card work?

John Peat · 11 Dec 2021 at 23:10

hd7950 said:
Thanks again, it seems to be working after updating the bios. WTF actually made it work, it doesn't make any sense to me? It was running perfectly for a year, then suddenly needed a bios update. Why did the other graphics card work?

You should really wonder why it stopped working in the first place - what made the PC freeze which started this little adventure??

it was likely either a power or heat issue - either the PSU glitched or your GPU got a bit too-hot or maybe it's starting to fail internally somewhere...

It will be worth testing that the card is cooling OK and then maybe just keep-an-eye and see what happens - you have a new PSU so that rules-out the old one for now...