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Flow Chart of Troubleshooting
9. Back Light (for Color Main LCD)
Backlight does not work
Is LCD Contrast set on high
level in the Menu?
CN800 pin 14 = H ?
U800 PIN 1 = 7V ?
Replace the LCD Module
Yes
Yes
Yes
Yes
Yes
END
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No
Set LCD Contrast on high level
No
Change the board to board
No
Check the U800 & the related circuit
7-20
FPCB
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