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Fault Diagnosis And Troubleshooting; No Power - LG WM3677HW Service Manual

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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.
Connector

NO POWER

Is the supplied voltage 120 V AC?
YES
Is the voltage between the 2 FILTER ASSEMBLY
connectors 120 V 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.
NO
Replace the FILTER
ASSEMBLY (CIRC).
Replace MAIN PWB
NO
ASSEMBLY.
YES
Reconnect.
Replace the MAIN PWB
NO
ASSEMBLY.

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