Panasonic TH-42PX20U Service Update Information page 50

Symptom: Horizontal Black Bar
(Completely dark)
Note: The use of a magnifying glass can help
localize the defective printed circuit board. Use
the magnifying glass to take a close look at the
pixels in the area of the black bar.
1 If the pixels are totally dark, the defect is
most likely located in one of the following
boards:
a) SC Board
b) SU Board (upper half of the screen only)
c) SD Board (lower half of the screen only)
2. If the pixels are dimly lit, the defect is most likely located in one of the
following boards:
a) SS Board
b) SS2 Board (upper half of the screen only)
c) SS3 Board (lower half of the screen only)
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Figure 31