spaul,
it looks like one of the display cables is no longer
properly connected.
If you have a jewelry screwdriver at hand, open the
display cover and check the two cables going to the
left and right PWBs. Best way is to open the connector,
pull the cable out and put it firmly back in.
Be careful while opening the connectors. The mechanism
breaks very easy if you apply too much force.
///TRIsoft
Marc Stephan