Sharp LC-20AD5E-BK - On Screen Display Does Not Appear

TROUBLSHOOTING GUIDDE
Is there signal at pins
2, 4 of IC101?
Is there color signal at
pins 83 and
84 of IC803 ?
Check IC101 and
peripheral circuit.
Check IC803 and peripheral
circuit.
Change MAIN PCB.
Yes
No
Yes
No
ON SCREEN DISPLAY DOES
NOT APPEAR
E-6