Flashing standby message.

I unplugged my unit over night and it became operable. However it was non responsive to the remote or manual buttons.

Are any of the buttons not making a click feel when you press them like maybe one is stuck?? You didnt say if the same thing happen with the radio as did with the cd. If it is then a switch is stuck or bad or a problem with the switch matrix for the Microprocesor . Only way to trouble shoot this is I would use a scope and check all of the matrix {ie scann lines as well as input lines for distortion or noise and make sure when the buttons are pussed that they change and switch accordinly. If they dont then the processors bad. Good luck