Sharp SGH-F250 - Manual (Page 47)

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Flow Chart of Troubleshooting
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9-19
9-8. Back Light (for Color Main LCD)
Backlight does not work
Yes
Is LCD Contrast set on high
level in the Menu?
No
Set LCD Contrast on high level
Yes
Change the Slide FPCB or LCD
No
Check the Slide FPCB
Yes
END