Troubleshooting Else - LG WM3988HWM Service Manual

8-5. TROUBLE SHOOTING ELSE
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.
Is the supplied voltage
120V AC?(+10%, -15%)
Is the current rating of
multi-outlet power strip
enough?
(Avoid connecting several
electric devices.)
Is the connector connected
to PCB/Noise filter
disconnected or
disassembled?
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NO POWER
Check the
fuse or reset
No
the circuit
breaker
Yes
Alternate with
No
explanation
Yes
Reconnect
or repair
No
the connector
Yes
manuals search engine
Is LED on while the power
is on?
Yes
Is three pin wire of
display PWB broken?
Display PWB
Connecting connector
MAIN PWB~ Display PWB
33
Replace the
No
MAIN PWB
ASSEMBLY
Replace the
No
DISPLAY
PWB
ASSEMBLY