Sharp XG-PH70X Service Manual page 49

Checking the Terminal unit.
Check input signal of INPUT1.
Check RGB input signal circuits.
Are there signal at C3031(B), C3038(G) and C3041(R) output?
YES
Are there any sync signal at pin (16) to "B", pin (18) to "G", pin
(20) to "R" of IC3007 output?
YES
CN3001 is not stable or breakdown.
PC board check
0
Is the user menu displayed?
OSD check
NO
XG-PH70X/XG-PH70X-N (1st. Edition)
NO Check C3031(B), C3038(G), C3041(R) and its peripheral circuits.
NO Check IC3007 and its peripheral circuits.
YES Checking the RGB input.
Checking the component input.
Checking of VIDEO input.
DVI digital input check.
End.
4 – 7