Please note that we are not answering TV technical support questions at the moment.
TNPA3911. This board has no suffix.
TNPA3814. This board has no suffix.
TNPA3818 This part has no suffix.
TNPA3812. There is no suffix for this board.
These board has the suffix stamped on the board. The suffix on this board is AC.
Part number found on board.
Both left and right speakers included.
TNPA3855S is a substitute for TNPA3855E.