Panasonic PT-40LC12 Service Manual page 29

No picture or abnormal picture
Check that there is no picture or abnormal
picture on the screen from all input
terminals.
(All input is NG.)
(Only line1 OR 2 input is NG.)
(Only line3 input is NG.)
(Only tuner input is NG.)
(Only PC input is NG.)
(Only Component 1 OR 2 input
is NG.)
(Component 1 AND 2 input is NG.)
(Tuner and Line input is NG.)
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 Rear Jack C.B.A. Still NG,
replace the Projection Unit.
Replace Rear Jack C.B.A.
Replace Front Jack C.B.A. Still
NG, replace Rear Jack C.B.A. or
TV Main C.B.A.
Replace TV Main C.B.A.
Receive any broadcasting and set
to split screen by pressing SPLIT
button on the remote.
Does the right side picture of split
screen appears?
YES
Replace Rear Jack C.B.A.
Replace Rear Jack C.B.A.
Is the all input mode type (480i,
480p, 720p, and 1080i) NG?
480p, 720p, and
1080i is NG.
Replace the Projection Unit.
Replace Rear Jack C.B.A.
NO
Replace the Projection Unit.
NO
Replace the Projection Unit.
NG
Replace Rear Jack C.B.A.