As mentioned before, I don't recall ever seeing DESiGNER MODE ... and don't see it in the manual either.
But ... do you read that message as DESiGNER MODE, then?
Plus the <-P<- indicator (which may be a clue); could this mean "Press the Memory Page button", I wonder (just a guess)?
I'm also wondering if the contents of EEPROM (U102?) have become scrambled.
Am I right in thinking you cannot attain Service Mode at all?
