Panel Free Run Mode - Panasonic TC-L42D2 Technical Manual

When a picture problem is encountered, the internal test pattern generator
may be used to determine whether the symptom is the result of defective A board or the panel.
The test pattern is displayed as follows:

Panel Free Run Mode

All video sources
contain distortion
Start the Panel
Free Run
Feature
Yes
Did the test
A-Board
patterns display
correctly?
No
Panel
Slide # 90