Samsung SYNCM.400B - User Controls Not Working

6 Troubleshooting
6-6 CKA42*7L/5227L
Location Function
C207 Horizontal Size
C208 Contrast
C209 Brightness
6-8 User Controls Don’t Work
Check the button
(SW201~SW203,
SW205~SW208 and SW211)
Check IC202.
Check IC202 and RESET circuit.
Does the DC level change at
Pins 29, 30, 31 and 32 of IC201 when
you push the front panel button?
Does the DC level change at
the positive pole capacitors
when you push the
front panel button?
(See table 6-2)
Yes
No
Yes
No
Table 6-2. Front Panel Button