Panasonic TH-42PX500U - Dark Picture Troubleshooting

Symptom 3: Picture Noise - Part of the previous picture remains on the screen.
Cause: There is no Erase Pulse in the Scan Drive Signal at pin 13 of connector
SC20/D20. The problem is the D board.
Figure 60
The approach to find the defective board is to check the pins of the connector listed in
the table below.
Check point
SC20 or D20 Connector
Pin 8 Pin 9 Pin 13
Defect Board
OK OK OK SC Board
NG NG OK D Board
OK NG OK D Board
OK OK NG D Board
NG NG NG D Board
Table 14
77