I have absolutely the same problem. When I start the car and after 10-15 mins if I open and close the driver's window - the same problem: No Sound; I can search the radio stations, but not find any; if I try to listen CD - only flashing the number of the disk ...... If I lock and leave the car for more than 2-3 hours - All working perfect again. If I open and close the driver's window again (10-15 mins after inignition) - the same - Sound missing, can't tune stations .....
I've taken the car to the Local Toyota/Lexus service - 3 hours tests, searching for the problem .... - 30 GBP and no result. Please help. P.S. I am from Bulgaria - The car was in TM Auto - the official Lexus service for Bulgaria.
Lexus GS450H end of 2006 year They CAN'T help