communication error.could be a loose connection from/to the display pcb.blue wiring loom going from main pcb at the side to the display gets a bad connection.usually on the display pcb end.disconnect and reconnect that loom tightening connections usually sorts issue.if it doesn't throw it away as repair cost can get expensive!!
ck
February 2014
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
