i had this happen with a 4350 or 60. It was frustrating as hell. The set would stop responding to anything but the oem remotes toggle power. then all would be fine. I tried the urc codes and made a ccf with the hex from pioneers site with the same result. i did 1 4270 and havent experienced this yet. (Knocking ever so profusely on wood)
Diplomacy is the art of saying hire a pro without actually saying hire a pro