LG LX-D2560A Service Manual page 17

YES
Check IC100 © IC301 DATA
communication
PIN PIN
75 PIN © 3PIN STB
76 PIN © 2PIN DO
77 PIN © 4PIN DI
78 PIN © 1PIN CLK
YES
FLT light on
YES
OK
NO
When 5V fails,check
D3191SR35 input and
output power
YES
Check the related part
YES
IC100
75 PIN © STB
NO
77 PIN © 4PIN DI
78 PIN © 1PIN CLK
Check Data output.
YES
Check 76 PIN © DO
© DATA input
YES
Check the related part
YES
NO
OK
NO
OK
- 3-4 -
Replace the related part
Replace the related part