![background image](http://html.mh-extra.com/html/samsung/sgh-e420/sgh-e420_service-manual_1190568051.webp)
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-16
9-9. LCD Part (for Color Main )
Is LCD Contrast set on high
level in the Menu?
Set LCD Contrast on high level
END
No
Yes
Yes
LCD does not work
SOC700 pin 29, 30 = 2.8V?
Resolder LCD module
No
Yes
F703 pin 3, 4, 5, 6 is OK?
Check the U401
No
Yes
Yes
Replace the LCD Module