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5-9
SGH-A408 Flow Chart of Troubleshooting and Circuit Diagram
5-9. Back Light
Backlight does not work
Y
Y
N
Y
Backlight
“ON” mode in
the menu ?
Select backlight “ON” mode
N
Y
CN601 pin 3 = “High” ?
Check M46(U201)
using Factory Test Program
N
Y
Check the
connection from CN601
to LCD Module
Replace flexible PCB
N
Y
LCD backlight on ?
Replace LCD Module
END
Check the connection between
CN601 and LCD Module.