Sony KD-75X7800F Service Manual page 61

4.5 NO PICTURE: HDMI 3
No Picture
Check HDMI cable
OK
Check other
HDMI input
All Inputs NG
Check Picture by other TV set
which is same model
Target board & other
TV set both NG
Is using HDMI splitter ?
NO
Check Source equipment
by Reference TV set
(For example, RB1)
Reference TV set
NG
Check the settings of
Source equipment,cable
NG
Change HDMI cable
Other Input is OK
Other TV set
OK
IC1000 NG
Connect Source
equipment directly
YES
Change B-Board.
And inform the designer of it
Reference TV Set
OK
Check the below point at
Connector side
・Check +5V line CL3644
・Check HPD line CL3627
・Check DDC lines CL3612/CL3613
・Check TMDS lines
+5V line OK
and HPD line NG
Spec:2.4~5.3V
+5V line NG Replace
R3627,R3634,R3639,
Spec:4.7~5.3V
R3643,Q3602
Replace R3644
NG
IC1000 NG
And inform the designer of it
All lines NG
Replace
CN3601
TMDS lines NG
Replace
RB3615,RB3616,
DDC lines NG RB3607,RB3608
Replace
RB3601,R3660,
R3661
NG NG
NG
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SYS SET