Sony KD-43X7 F Series Service Manual page 26

3.4 : 4x Blinking – Panel Power Error
BB9 Board
Start
*Check Adaptor /
G board connection
TV boot up normally?
Yes
Check voltage at
+12.5V_TCON
10.8V-13.2V
Yes
Yes
TV in standby mode?
No
No
Check PANEL_PWR
3.00V-3.33V?
End
*Check Adaptor / G-board connection
CHL 43/49 = LD board & Adaptor
CHL 55/65 = G-board
Adaptor: Remove and reinsert Harness from LD board  Main board
G-board: Remove and reinsert Harness from Gboard  Main board
RC ON
No
Replace Main IC / B-Board
No
Yes
Check +12.5V_TCON
Suspected LD board /G
No
Board side issue.
Replace PSU unit board
10.8V-13.2V?
(Supplementary
26
information)
SYS SET