LG LMVM2277ST Product Training Manual page 74

Door Disassembly
When replacing the door, adjust it to be parallel to the
chassis. There should be no play between the inner door
surface and the oven frame. If the door is not mounted
properly, microwaves may leak between the door and oven
or the monitoring and safety switches will prevent usage.
T-23
LMVM2277ST
74