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Flow Chart of Troubleshooting
9-18
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9-9.
Back Light (for Color Main LCD)
Is LCD Contrast set on high
level in the Menu?
Backlight does not work
END
No
Yes
HDC702 PIN 40 = H ?
No
Yes
Check I2C data is OK?
No
Yes
Set LCD Contrast on high level
Resolder HDC702 or change PBA
Check related circuit from UCP401
Yes