My Meade Autostar 497 hand controller has blank display & sometimes it starts showing garbled characters & for some times it starts normally and goes blank after 30 seconds or so. Other functions like slewing with arrow keys is working fine. I tried suggestions from other threads on Cloudynights forum for same topic like cleaning the display ribbon with alcohol and stuff but no luck. Please suggest any solution if you have successfully brought back display. Thanks in Advance. I have attached photos of my Hand Controller. Telescope is meade ETX-125 5 incher Maksutov Cass.