Back Light (For Color Main Lcd) - Samsung SGH-E370 Service Manual

9-9. Back Light (for Color Main LCD)

Backlight does not work
Is LCD Contrast set on high
level in the Menu?
U100(SUB PCB) PIN 3 = H ?
U100 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
Check the inserting condition of slide FPCB
Resolder UCP201
No
Check the U100 & the related circuit
9-15
Flow Chart of Troubleshooting
or change PBA