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Troubleshooting Procedures
6-58
WFM90D and WFM91D Service Manual
Use this procedure when the
display is dim or blotchy.
Replace the Display module. (For instruments
with serial numbers below BO20100, replace
the Backlight in the Dis play module.)
Figure 6- 34: Flowchart for dim or blotchy display
Use this procedure when all
of the display modes are bad
except Picture when no
menus are displayed.
Replace the Top board.
Figure 6- 35: Flowchart for bad displays except Picture m ode