F1069FD8 - LG Washing Machine Service Manual (repair manual). Page 23

9. DIAGNOSIS AND TROUBLESHOOTING

1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.

Is the supplied voltage AC 220 - 240 V, 50 Hz?

Is the LED lamp 

on?

Are the connectors 

on the PWB loose?

Is wire of the DISPLAY PWB ASSEMBLY  
broken?

Replace  DISPLAY PWB ASSEMBLY 
or repair wire.

Check the fuse or reset
the circuit breaker.

Replace the FILTER
ASSEMBLY (CIRC).

Replace MAIN PWB
ASSEMBLY.

Reconnect.

Replace the CABLE
(HARNESS)

Is the voltage between the FILTER ASSEMBLY
connectors 

and 

AC 220 - 240 V, 50 Hz