E1 F6 failed COO diagnostic check

Washer stopped mid cycle with a E1 F9 error and an E2 F6 error. I checked the pump filter and found a bunch of change in it. Tried running again and now I only get an E1 F6 error.

I did the diagnostic self check and it just kept blinking the door lock. It seems to work fine though as it unlocks and locks the door. But I never heard the pump come on. Pump, door switch, motor all ohm fine. Then it just errors out after about 10 minutes.

Do you think it’s the CCU or MCU board? When I pulled the MCU, I saw a small black mark on the plastic and maybe… a burnt tiny black piece. Really hard to see it though.