![background image](http://html.mh-extra.com/html/samsung/sgh-z105/sgh-z105_service-manual_1191317039.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-13
9. Key Back Light
Is BACKLIGHT set
AlwaysON in the Menu?
Set BACKLIGHT on AlwaysON
END
No
Yes
Yes
Key Backlight does not work
CN804 pin 30 = "L"?
No
Resolder CN305 pin 30
or replace KeyPCB Module
Yes