LG LMVM2277ST Product Training Manual page 23

Turntable Installation
Place the round glass tray on
top of the rotating ring. Put a
cup of water on the turntable
and operate the oven for a
minute to ensure that the tray
mechanism is seated properly
and works as it should. There
should be rotation on the
turntable AND lateral motion
involving the rectangular tray.
T-9
LMVM2277ST
23