SUGGESTION # 1----switch the set over to ANTENNA use and try an antenna on it and see if the picture looks better (assuming you're in a location to receive some sort of local tv channel "off air") SUGGESTION # 2-----Try another tv set on your sattelite receiver and see if the problem still persists on another set---if it does, your problem is in the sattelite receiver---if it doesn't, then the problem is in your big screen set. IF the problem IS in your big screen set---see a repair tech---it probably will be too major a problem to attempt fixing yourself or trying any other quick fixes via internet help. HOPE this gives you a little luck in at least "localizing" the problem PS: lightning hits can cause very extensive, expensive, and sometimes very illuding, time consuming and challenging "multiple" repair problems / headaches welcome to the "UNFORGIVING WORLD of SOLID STATE"--where all is lost in microseconds---HAIL VACUUM TUBES--FOREVER !!!!