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Flow Chart of Troubleshooting
9-13. Key Back Light
Key Backlight does not work
Yes
No
Is BACKLIGHT set
Set BACKLIGHT on AlwaysON
AlwaysON in the Menu?
Yes
No
Replace or Resolder U700
KEY_LED_3.3 ≒ 3.3V?
Yes
Replace the Key FPCB
Yes
END
9-23
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