@phaedrux Since I have a cloned 6HC board that works without issue using the all the same hardware: SBC, ribbon cable, etc.., I don't think this is a problem with my setup. FWIW, and in case you're wondering why I'm posting if I have a clone board that is working, I bought the genuine board after buying the clone because I wanted to support Duet3. Unfortunately, I'm not altruistic enough to settle for the clone board after having paid the full price the genuine Is it possible I can get an RMA?

@phaedrux Sorry for the slow reply, the SBC console just says "failed to connect to duet3" in a bright red popup. I haven't tried the board in standalone mode, and I'm not sure how to get at any more verbose logs?

@blt3dp Sorry for the slow reply. no there wasn't an SD card in the new board.

Hello, I recently purchased a genuine 6HC board as a replacement for cloned 6HC board. The new board appears to startup correctly based on the LEDs, but it never connects to the SBC. FWIW, I'm using an RPI4B. I tried updating the boards firmware, and using fresh install of DuetPI on the SBC. Regardless, the board never connects to the SBC. The exact same setup works correctly with the cloned board, so I'm assuming it's a hardware issue. But I'm open to investigating other possibilities if anyone has a suggestion?