LG MC3283FMPG Service Manual page 26

Failure mode: Button Malfunction
Unplug the power cord
and then again insert
All buttons
Malfunction
Yes
3
Check whether the button is
stuck when you press any button
~ A good working switch makes
some sound on press
Button Stuck
Yes
Adjust the stucked buttons on control
panel by loosening screws
Adjust or replace moulding
No
No
Failure symptoms
- No cooking start - Not start cooking.
- Button cannot be input
Only the Start
button malfunction
Yes
4
Replace PCB
-22-
No
3