@wikipedia_Brown You will need to provide the SN of your board along with a copy of the results of the M122 command and send it to info@duet3d.com. They should confirm that it is to be replaced.
Once you have that confirmation from duet3d, send a message to support@printedsolid.com. Include the confirmation and then they will send you an RMA#.
I got a message from Dustin at Printed Solid today saying that they do not yet have replacement boards.
Hopefully soon.