@jay_s_uk Thanks.

I tried that but I don't see a DIAG LED lit - so no 5V? I have the green 3.3V though.

BL touch deploys, bed heater turns on automatically.

New Duet2?

If I replace my Duet 2 WiFi, is the configuration file for the printer on the SD card?

I have mysteriously lost comms with my existing board, and I didn't do the config.

Any help appreciated on how to migrate onto a new board? Thanks

Re: Duet 2 Wifi stopped communicating via wifi and USB

Similar situation -

Duet2 WiFi, DueX 5expansion and PT100 driver board on a Vivedino core XY.

I was communicating fine wirelessly pre-heating the hotend to change a heatbrake and the Duet stopped coms mid-task. No comms on USB with or without SD card either.

When I apply power, the bed automatically starts heating, and the BL touch.

No DIAG LED

Where do i go from here?
Thanks