Samsung PN50A550S1FXZC Service Manual page 29

Troubleshooting
Symptom
Either the main or sub picture does
not appear.
A vertical green line appears on the
screen.
Dim screen (blurred in red)
A blank screen appears
4-6
Related Image Causes and Countermeasures
Replace the Main board
The SMPS voltage is incorrect
- Adjust the SMPS voltage
according to the voltage printed
on the module label
X-Main board defect
- Replace the X-Main board
- Replace the Y-Main board
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