Bonked MSI Motherboard?

Hola folks,

I can only boot with a single stick of RAM in slot 4.

Specs:

CPU: i5-12400

Mobo: MSI B760 Gaming Plus Wifi

RAM: Corsair Vengeance RGB ddr5 96GB 6800mhz

What I have tried so far:

1. Try single stick in every slot. Only works in slot 4.
2. Try other single stick in every slot. Only works in slot 4 (but this means both sticks have no problems)
3. Put both sticks in slots 2 and 4.
4. Put both sticks in 1 and 3.
5. Put both sticks in every possible permutation
6. Update bios to most recent version, with M-Flash. Version 7D98vHx now, successfully updated.
7. Load optimised defaults
8. Increase voltage to RAM to 1.15.
9. Increase timing adjustments by 2 each
10. change DRAM timing mode to unlink
11. Decrease frequency to 3600mhz
12. Rest Bios to optimised defaults. Load XMP profile for RAM sticks
13. Clear CMOS
14. Swap out RAM sticks for Corsair Vengeance DDR5 32GB 6000mhz, also slots 2 and 4
15. Remove cpu cooler and reseat CPU
16. Use alternate PSU

Nothing works. Always get the flashing from red to orange, then solid Orange Ez-Debug light, with no video output.

See attached photos of my CPU and CPU tray on the motherboard. Do either look damaged?

Is my motherboard/CPU just fucked?

Anyone have any suggestions on what else to do?