"Charles" wrote in message
...
Any ideas?


Apparently this is a pretty common problem. There are kits for the 80 series
being sold on eBay - not sure if there are kits for the 77. You could try
contacting that seller.

As I recall, it's simply that there are bad connections between the circuit
board and the display module. Cleaning the connectors ought to help. IIRC
there is a rubber-looking conductive extender between the board and the
display the edges of which need to be cleaned as well.

Mark Z.