Samsung GE89M-S Service Manual page 33

4. Troubleshooting
4-4-18 If button malfunction
Buttons of the control panel do not work.
Are button pressed
in the correct order?
YES
Is the connector of the
control panel normal?
YES
Replace PCB.
NO
Refer to User Manual
Tact type
NO
Menbrane type
33
*Inspection method