Samsung CS2551SX Service Manual page 40

Troubleshooting
5-4 Horizontal Lines Appear on screen
Normal
Check/Replace
IC301
5-4
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Horizontal Lines
Apper on screen
Normal
Check
the VDP Signal
output from IC201
Pin 31
Abnormal
Check
IC201
Check
Abnormal
IC301 B+
(16V, -16V)
B+ Line and the fusible
resistance of R425, 424
Check
Samsung Electronics