have you tried disconnecting the touch panel ribbon, if it has one, just after you start the programme ?
that way if it touch panel contamination it should stop
also be careful, there seems to be a mistake on hoover tech site. there are 2 boards, serial no dependant listed but they don’t state the serial no for the second one. they list both on connect but if you glance at it you would order the programmed board when I think its the other one
no one has stock either board
Dave