TroubleshootingProcedures
6-58 WFM90D and WFM91D Service Manual
Usethis proc edure when the
displayis dim or blotchy.
Replacethe Dis play module. (For instruments
withserial numbers belowBO20100, replace
theBacklight in the D isplay module.)
Figure6 -34: Flowchart for dim or blotchy display
Usethis proc edure when all
ofthe display m odes are bad
exceptPict ure when no
menusare displayed.
Replacethe Top board.
Figure6 -35: Flowchart for bad displays except Picture mode