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Flow Chart of Troubleshooting
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9-19
9-10. Key Back Light
key Backlight does not work
Replace LED
Yes
OK
Not OK
Resolder C317 and R315, replace U306.
Check VDD_KEY_ON and
C317, R315
Yes
Yes
No
END
Set BACKLIGHT on Always ON
Is BACKLIGHT set AlwaysON
in the Menu?