Hitachi 850121538 Main Board
part number is not found on the board or any stickers, the part number
is a manufacturer part number.
Please ensure your TV model is LE55A6R9 and that the main board
has JUC7.820.00121165 printed on it.
PLEASE NOTE: These models also have a history of LED strip failure. If
this board does not fix your TV,
there's a good chance that the LED strips have failed.