Riddle me this. B550M Pro4 won't post

Have tried with 550w seasonic 80+ bronze, bequiet 1000 80+ platinum as well. It isn't the psu guys. It has to be a bios issue and I need a way to flash back. In the mean time it has been more than a week and no reply from Asrock about my RMA request.

ThreeDee wrote: Just checking as I'm scratching my head over your issue .. so you tried booting without a keyboard or mouse plugged in?

I have tried both with and without. I have tried to boot without RAM still both light come on, even hooked up a speaker to check on post messages if any but none.

ThreeDee wrote: Also, it would stand to reason that if it's indeed a BIOS issue, then ASRock RMA services wouldn't have been able to boot the board up..?

That was what I was expecting when I send the board back to the shop where I bought it. But alas it booted up. At least the pictures they sent me showed a B550M Pro4 Motherboard BIOS (Attaching link from the picture they have sent me at the botom of this message)

ThreeDee wrote: You say it boots up when it's not at home .. maybe take your mobo and a PSU over to a buddy's house and see if it boots there?

Did that and it didn't. Leds come on right away exactly as in my house, even tried his ram and still no go

ThreeDee wrote: What was their "test" CPU? .. and are you obsoletely certain they booted up your board?

They used a 3100 as well and a random 8GB memory module as they said and no I cannot be certain but isn't it a bit far fetched to go into great length just to avoid a DOA?

ThreeDee wrote: Do you have a local PC shop you could have them test stuff out for you? .. then if it doesn't boot for them, you can add that info to your next RMA attempt

I don't no in my area, but I gave it to a friend who builds computers and worked on a repair shop to try and test it. No luck. It just won't post at all and the leds light up immediately.

If the shop hadn't send me those pictures of the motherboard booting up I think we would all agree that the motherboard is at fault and I guess it is. If they tricked me then ASRock will validate that the board is faulty if I RMA it. If they didn't trick me and somehow they managed to reseat the ram better than any of us that have tried before then I am at a loss since we really tried but I mean how difficult is it to reseat a RAM module. Keep in mind that the computer suddenly stooped while it was working fine which is another piece of the puzzle that I cannot explain.

https://www.dropbox.com/s/2mst18qv4puc6qa/01.JPG?dl=0

Like I wrote earlier I have tried three different CPU's and they all resulted in the same error on the mobo. A 3100, a 3950x and a 4350G to see if an Apu might do the difference.

It is highly unlikely that all failed on the specific motherboard and work on the systems they were pulled from.

Keep in mind that all the items on the OP work just fine to date with an MSI B550 Pro - A

The memory isn't in the Asrock qvl list but it worked on first try and I have tested it with HyperX from the qvl, and still no dice.