Sharp LC-20SD4E Service Manual page 22

THE PICTURE DOES NOT
APPEAR. (DIGITAL)
DOES AN ERROR
MESSAGE DISPLAY
IT?
YES
IS THERE SIGNAL AT
PINS 2 AND 3 OF
CP2402 ?
NO
CHECK SUB POWER PCB
TROUBLESHOOTING GUIDE
NO
YES
E-4
CHANGE DIGITAL TUNER
MODULE.
CHANGE DIGITAL TUNER
MODULE.