Led Blinks 1 Time - Panasonic TH-42PX80U Technical Manual

<Trouble Mode and Defective Board>
Trouble Mode
Communication Error
Disconnect GS52 on the SD Card Slot Board (GS board )
(See Figure 1). Plug in the TV and turn it on
No
Replace the GS
board

LED blinks 1 time

Defective Board
A, GS
Is the power Yes
LED still
blinking?
Replace the A
board
Warning: Disconnect AC Power prior to
making any disconnection or
8
connection.
Figure 1