Sony KD-43X85K Service Manual page 83

TROUBLESHOOTING
6.3 Wi-Fi Bluetooth - Bluetooth malfunction
Bluetooth Remote doesn't work
Or
Bluetooth Mouse/Keyboard/Controller doesn't work
Or
Bluetooth Speaker/Headphone/ doesn't work
"Settings" 
"Remotes & Accessories" 
"Bluetooth Settings"
("Bluetooth" turn ON)
NG
Check FFC 20P
connection is OK between
Wi-Fi/BT module and BM5A
board
OK
Change
Wi-Fi//BT module
OK
Wi-Fi/BT module
Please refer connection instruction
OK
or device manual
NG
Connect properly
NG
Change FFC 20P
Between BM5A board
and Wi-Fi/BT module
NG
OK
FFC 20P
OK
Loose FFC 20P
NG
Change BM5A board
FH
BM5A
FFC 20P
Wi-Fi/BT modules
DHUR-SY63
83
SYS SET