Sony XR-55X90K Service Manual page 88

TROUBLESHOOTING
4.5 No Picture: HDMI 1/2/3/4
No Picture
①
Check HDMIcable
OK
Check other
HDMI input
NG
Check Input with Others TV
Target board & other
TV set both NG
Is using HDMI splitter ?
NO
Check Source equipment
by Reference TV set
NG
Check the settings of
Source equipment, cable
NG
Change HDMIcable
OK
OK
Change Main-Board.
YES
Connect Source
equipment directly
Go to
OK
Change Main-Board.
Check the below point at
Connector side
・Check +5V line CL4009/4011/4013/4015
・Check HPD line CL4008/40010/4012/4014
+5V line OK
and HPD line NG
Spec:2.4~5.3V
①
Change Main-Board.
+5V line NG
Spec:4.7~5.3V
Part is OK
Check R4036,R4037,
R4038,R4039
Part is NG/Missing
Replace the part and
check again
88
SYS SET