FLY FS403 Service Manual page 21

FLY SERVICE SUPPORT
4.4 Keypads not work
Keypad not work
Volume key not work?
Power key not work?
Yes
Yes
The resistance to
The resistance to
ground of these
ground of the keypads
keypads ok?
ok?
no
no
Yes
Yes
Change
Volume key
Change
Power key Heat or change U301