Samsung SGH-B300 Service Manual page 28

10-1-8. LCD
Backlight does not work
Backlight ON "TIME"
mode in the menu?
Check conecting
between PBA and LCD
Check HEA600 △v(pin
3.1/2.7V(dimming)
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Yes
conector
Yes
#13) =
Yes
END
10-16
Flow Chart of Troubleshooting
No
Select backlight "15 sec" mode
No
Check FPCB
No
Check the LCD