LG LMV1813ST Service Manual page 20

After power on, does the
product operate?
No
1 Repeat door open and close
more than three times.
Does product operate?
No
2 Is there any beep sound in
continuity test between TAB1
and TAB2_(EZ-On)
No
Alternate with
Yes
explanation
(Refer to the
Note)
PCB No
Yes
Problem
-20-
3
Is the connector connected to
Power PCB and MAIN PCB
assembly disconnected or
disassembled? (CN6, CN7)
No
4
Replace the
PCB
(EBR64419603)
[Note]
If something is caught in the door or in the sealing
area, the microwave oven cannot operate safely. The
latch switches and monitor switch will prevent
operation.
Reconnect or
repair
Yes
the connector.