Sharp LC-26SH12U - 26" LCD HDTV Service Manual page 23

THE PICTURE DOES NOT
APPEAR (1)
Does backlight shine?
Yes
Is CD7201 connected?
Yes
Is there voltage at pin
28,29,30 and 31 of
CP2407 5V?
Yes
Is there signal at pins 7,
8, 10, 11, 13, 14, 16, 17,
19 and 20 of CD7201?
No
Is there signal at IC2405?
Yes
Check DIGITAL PCB.
TROUBLESHOOTING GUIDE
Is there voltage at pins 1,
No
2, 3, 4 and 5 of CP406
No
Connected CD7201.
No
Check Q3410 and
peripheral circuit.
Yes
No
No
Yes
E-3
Check IC401, T401, D437
and peripheral circuit.
Change V2301(PANEL).
Change IC2405.