Menahem, I followed your directions and actually left the battery disconnected for several weeks to make sure, and also took out the fuse. Still is locked on the CD player. At least I got to see the insides and do some gentle cleaning. Any other thoughts? No one else seems to have any ideas. Doug

Several months ago my wife punched in a series of random numbers on my control panel. Now, whenever I turn on my system, it locks on the CD player, which I do not have any more as after replacing 3-lasers, replacement parts are not available here in California. As a result I cannot turn on the receiver or the phonograph; I have tried disconnecting everything