hi,sounds like a dirty laser lens.If after inserting a cd no info about your cd appears on your display then the laser has not found focus(unable to read the info on the cd).The first thing to do is use a cleaning disc,most audio shops sell these cds,this type of cd comes with a cleaning fluid,just follow the instructions(try this cleaning cd a few times and see if this clears the problem).If this fails most likely you need the laser replaced.this can only be carried out at a repair shop,hope this helps
Tom, June 2010