Panasonic TH-42PZ80U Technical Manual page 42

Diagnosis for Picture Problem
<Diagnosis (3)>
Confirm the waveform at "TPSC1" after removing the SU or SD Board from the SC Board
<Result>
Situation
Disconnect
(Connect SD)
Disconnect
(Connect SU)
Disconnect the SU
and SD Boards
Correct Waveform
SU Board
SD Board
SC
TPSC1
Condition
OK?
Waveform
OK?
Waveform
OK
Waveform ?
SU
<Back side view>
SD
Buffer IC
42
(All Over the Screen)
Condition 2 Cause
Bottom half of
SU Board
Picture OK?
Upper half of
SD Board
Picture OK?
Screen should
SC Board
be black
SS
Buffer IC