Question Error code "2d" on ASRock Creator wrx80 after replacing RAM modules and cooler

[lekon44]

I'm part of a research group that recently assembled a novel workstation to run finite element simulations.

Specs:
AMD Threadripper Pro 5955 WX
x4 128GB RAM
Geforce GT 730
Noctua NH-D9 TR5 cooler

We assembled the PC, and noted that the workstation was running the finite element simulations slower than expected.
It turned out that one of our group members had installed the 4 RAM modules in the wrong slots (C1, D1, E1, F1) as opposed to (A1, B1, G1, H1), cf. ASRock manual.


I then did the following:
- Turned off power and unplugged PC
- Grounded myself
- Unscrewed the Noctua cooler to get better access to the RAM modules

- Changed placement of the RAM modules (avoided touching the golden pins, and didn't apply excessive force)

- Put the cooler back into place, avoiding excessive torque and following ASRock manual instructions.



Now, upon restarting, the motherboard shows error code "2d". The manual says for error codes 00-19 “Please check if the CPU is installed correctly and then clear the CMOS"


Things I have tried to debug are:
- Tightening the screws on the cooler
- Flush CMOS

Next, I would try to reseat the CPU. Please advise if you have better ideas.

Thanks!