Samsung PS50Q91HX 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
4-14
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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