well depends on your skill set
next is to check power is getting to the board and I think the board has a fuse on some models
first I would remove all the multi plugs from the board and put them back on the hope its a bad connection
if all fails prob a board fault as these don’t have well made electronics
if it was me I would check the board power supply which is the circuit on the board supplying the low voltage to the electronics but that starts getting technical and risky for the average person to do safely
you may well need professional help of give up and replace
Dave