Fault Diagnosis And Troubleshooting; No Power - LG WM0742H*A Service Manual

8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

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

NO POWER

Is the supplied voltage 120V AC?
YES
Is the voltage between the 2 FILTER
ASSEMBLY connectors 120V AC?
YES
Is the LED(1) on?
YES
Are the connectors(2) on the PWB loose?
Is wire of the DISPLAY PWB ASSEMBLY
broken?
YES
Replace DISPLAY PWB ASSEMBLY or repair
wire.
NO
21
Check the fuse or reset
NO
the circuit breaker.
Replace the FILTER
NO
ASSEMBLY (CIRC).
Replace MAIN PWB
NO
ASSEMBLY.
Reconnect.
YES
Replace the MAIN
NO
PWB ASSEMBLY.