Panasonic PT-43LCX64 Service Manual page 77

No picture or abnormal picture
Check that there is no picture or abnormal
picture on the screen from all input
terminals.
(All input are NG.)
(Only Video1 OR 2 input is NG.)
(Only Video3 input is NG.)
(Only Tuner input of Right screen
for split screen or PIP screen is NG.)
(Only RGB1 input is NG.)
(Only RGB2 input is NG.)
(Only Component 1,2, OR 3 input
is NG.)
(Component 1,2, AND 3 input
is NG.)
(Only HDMI input is NG.)
(HDMI AND RGB input is NG.)
(Tuner, Component AND Video input
is NG.)
(PC/SD Card input is NG.)
(Tuner input and Menu (OSD) display
are NG.)
(Tuner input is OK, Menu (OSD) display
is NG.)
(Tuner input is NG, Menu (OSD) display
is OK.)
Note:
Menu (OSD) is produced by the DTV Tuner Unit.
ABNORMAL PICTURE:
No Color Picture (Black and White picture)
Abnormal Color Picture
No Synchronization Picture
Dark Picture
Does the OSD appear on the
screen?
YES
Replace the Rear Jack C.B.A.
Replace the Front Jack C.B.A. Still
NG, replace Rear Jack C.B.A.
Replace the Tuner C.B.A. Still
NG, replace the Rear Jack C.B.A.
Replace the Main C.B.A.
Replace the Front Jack C.B.A.
Still NG, replace the Main C.B.A.
Replace the Rear Jack C.B.A.
Replace the Main C.B.A. Still NG,
replace the Rear Jack C.B.A.
Replace the Main C.B.A.
Replace the Main C.B.A.
Replace the Rear Jack C.B.A.
Replace the Main C.B.A.
Replace the Digital Tuner Power
C.B.A. Still NG, the DTV Tuner Unit.
Still NG, replace the Main C.B.A.
Still NG, replace the Tuner C.B.A.
Replace the DTV Tuner Unit. Still
NG, replace the Main C.B.A.
Still NG, replace the Tuner C.B.A.
Replace the DTV Tuner Unit. Still
NG, replace the Main C.B.A.
Still NG, replace the Tuner C.B.A.
Still NG, replace the Rear Jack
C.B.A.
NO
Replace the Projection Unit. Still
NG, replace the Main C.B.A.
Replace the Main C.B.A.
In the case that one or some input
is NG, it can be judged that the
Projection Unit is OK.