I had the same problem with my LW3.I purchased the updated eproms for the MPU version 2.08 and display driver version 2.06 from John Wart Jr and that cured it. His stuff is on eBay if you want to go that route or contact him from this site. The old display driver setup used 2 eproms and the newer version has 1 eprom. The new one is for ROM 0 in the U 12 position.R11 must be cut out for proper operation.. It is a zero ohm resister/ jumper wire.