Some C6H motherboard won't boot in some circumstances and all display error code 40. Restart the system solves it.

Hey! So this is probably my last case resort before I start tearing the system apart and completely rebuilding it with a new motherboard. I recently picked up the bestbuy ASUS 3080 pc and decided to transplant the components with existing components from a ryzen 5, 580x build of mine (ram and psu into a new case, cooler, and motherboard. I managed to grab a Maximus XII Hero on amazon warehouse for $160 so I centered the build around that and it came pretty much brand new.

Now to what's been making me feel so defeated: I spent about 11 hours disassembling both PCs and building two of them again. However when I tried booting up the PC that I was planning on using as my main driver, it boots and cycles to asus post code 40 (which has something to do with waking from crashing) however nothing appears on my monitor. I replaced the 3080 with a 3060ti that I planned to put in the other PC for my brother to test if it was a video card issue, however the same issue persisted. All fans spin, no weird noises, and there's just no visual.

Does anyone know what's up? In the worst case scenario my motherboard is DOA which would be tragic. However I'm hopeful that this just has something to do with a BIOS update incompatibility due to the lack of either 11th gen support on this z490 chipset (although from my research there shouldn't be) or something to do with the 3080/3060ti being PCIE 4.0 in a PCIE 3.0 slot? Does anyone have any ideas for things I can try out outside of just replacing the motherboard?

Things I plan to try:

1. Removing ram sticks

2. Updating bios(?) no idea how since I can't get into BIOS

3. Trying the old RX580

4. Last resort, replacing the motherboard (I don't have any more thermal paste or sticky washers from arctic, so I'll have to figure out how to get more.)

Thank you so much for taking the time to read this, I'm sad and angry at myself for not testing on the bench before putting everything together and honestly just want something to display so I can work.

PCPartPicker Part List

I just finished building my computer and occationally when I turn it on, the computer doesn't boot. The Error code on the board is code 40, and the CPU debug led it lights sometimes. I need to restart the pc 3-4 times and then the error goes away and the computer works normally.
My specs are:
Cpu: Ryzen 9 3900x
Mobo: Msi meg x570 ace
Ram : Corsair vengeance pro 2x16gb @ 2666MGz
Graphics: Geforce 2080 Super

I didn't make any changes in the bios and its runnin ght most up to date stable version.
Any one knows why this error could be occuring ? On install I made sure there was no pins damaged on the CPU

Thank you.

Ok, so I'm having a bit of a problem here. Every other startup I get a bootup motherbrand logo on screen and then display just fades out. Post code shows 40 but nothing is happening.

Sometimes, If I wait long enough. 10 minutes give or take, the computer boots up properly during the long weird ass boot.

I did several clean install and it started happening even with a backup windows drive.

A lot of the errors I'm getting are

*Event log error event ID 6008

*Volmgr error Event ID 161

*Kernel Power Event ID 41

*Event log Error Event ID 1101

*Bug Check Error Event ID 1001

 -----here are my specs-----

*Gigabyte X570 Aorus Master rev 1.0

*Ryzen 9 5900x

*16GB 8x8 3600MHz CL15

*EVGA 3080 FTW3 Ultra

*Inland Performance Pro 1tb Gen4 (game drive)

*Inland Premium 1Tb Gen3 (OS drive)

*Corsair hx1000i Platinum

I've been going through for a while now and I honestly don't want to deal with Gigabytes horrid RMA.

Please help.

EDIT: Pictures of event ID EDIT 2: Videos Showcasing what happens

EDIT 3: Solved it. It was windows Fast startup. I had to disabled it in the "Change what the power buttons do".

Man this journey was so damn weird.