@Phaedrux I've sent that all and I figure I can mark this as solved.

Thank you for your time @Phaedrux

@Phaedrux

Sorry for the slow response that was more difficult to collect than I thought it would be, thank you for looking this over.

The power supply seems to be ok, both visually and the voltage reported in the M122 command matches.

I replaced the with a new one cable to try and eliminate that, and both cables show the same behavior.

I grabbed a new stepper motor and the behavior persists.

I am struggling to get the M122 command after the error as the web interface and on-board seem to be in an infinite loop of displaying the error with a close button. Attached is M122 from right before it happens.
Is there another way I can try to capture the M122 after I hit the issue?

Thank you again.

Here is M122.txt

I'm starting to think my 6HC has something wrong with it. Whatever I plug in to Driver 0.1 twitches erratically and then I got the error "Driver 0.1 error: phase B short to Vin"
Today I started getting "Warning: 12V under-voltage event (9.5V)" but seemingly at random and it recovers.

I've visually inspected the board and nothing is obviously wrong. I don't think it is still under warranty. Should I replace the board or is there something worth trying first?

@Phaedrux I don't have access to the DWC. I'll follow the steps below. Thank you.

Hello Duet3D forum,

I have a Duet36HC running in SBC mode that seems to be dead after a bad firmware flash. Is there a way to re-flash the firmware from the SBC? The directions fallback directions do not seem to line up with the layout on the Pi.

Thank you