Vertical line problems
Figure 57
Thin vertical line or no picture in one block
A thin vertical line or picture in ¼ of the area driven by a C board indicates a defective
driver IC that is mounted on the ribbon cable that connects the C board to the panel. To
resolve this problem the panel has to be replaced.
A number of blocks do not light up
The likelihood of all four driver ICs of the panel being defective is very small. Such a
defect usually indicates that the C board may be defective or the D board may not be
providing the drive data for the C board. To resolve this problem, replace the C board
first. If the problem persists, replace the D board.
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