![background image](http://html.mh-extra.com/html/samsung/gt-b5702/gt-b5702_service-manual_1192141033.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-3
This Document can not be used without Samsung's authorization
9-1-2. LCD Working
Power Switch On
LCD FPCB
connector is co
rrectly connecti
ng?
Yes
Replace U707 & Check
neighboring circuits
Yes
NO
Yes
UCP400
Replace
U709
Replace
NO
Yes
LCD
Replace
C714
LED+_23V= 23V?
U709
3rd pin LCD_EN
= High?
NO
Yes
C718
VLCD_3.0V =3.0
V?
F803, F804, F805
Resolder
NO
F803, F804,
F805 Correctly
mounted?
NO
correctly connect
Yes
NO
LCD Display
On?