Samsung SMH7187STG Service Manual page 24

4. Troubleshooting
4--1 Key Short Error
The membrane
is defective.
Replace the
Control Panel.
"- SE -" is displayed.
YES
Is the key not recognized
YES
Is the key recognized
intermittently?
Is a specific key
YES
not recognized?
After Power > On,
NO
does the symptom continue?
Replace the PCB.
Perform the operation again and check if it
is working properly.
4
at all?
NO
NO
NO
S/W Error
YES