Example Of Trouble Shooting - Samsung PS43F4100ARLXL Service Manual

4.2.1. Example of Trouble Shooting

Symptom
A blank vertical cell (block)
appears on the screen.
A green screen appears when
the TV is turned on.
The OSD box appears but there
is no text.
A blank upper (or lower) block
appears on the screen.
Either the main or sub picture
does not appear.
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Related Image Causes and Countermeasures
• Address buffer defect
Replace the corresponding upper/lower
•
buffers.
• COF defect (burnt)
Replace the module.
•
The Scale is not resecting.
•
Replace the Main board.
•
Incorrect program version.
•
Check the version of each program.
•
Replace the Main board.
•
Upper/Lower Y Buffer defect
•
• Replace the corresponding upper/
lower buffers.
Replace the Main board.
•
4. Troubleshooting
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