Samsung SGH-B100 Service Manual page 46

10-1-8. LCD
Backlight does not work
Backlight ON "TIME"
mode in the menu?
Check conecting
between PBA and LCD
Check U600 △v(pin #27
- #29,30) =
3.1/2.7V(dimming)
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Yes
conector
Yes
Yes
END
10-15
Flow Chart of Troubleshooting
No
Select backlight "15 sec" mode
No
Check FPCB
No
Check the LCD