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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-6
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9-1-2. LCD Working
Power Switch On
LCD FPCB
connector is co
rrectly connecti
ng?
Yes
Replace U700 & Check
neighboring circuits
Yes
NO
Yes
Change
Main PBA
U706
Replace
NO
Yes
LCD
Replace
C707
LED+_18V= 18V?
U706
3rd, 4th pin
LCD_EN = High
NO
Yes
C704, C703
VLCD_IO_2.6=2.6V
VLCD_3.0V =3.0V
F703, F704, F705,
F706, F707
Resolder
NO
F703, F704,
F705, F706,
F707 Correctly
mounted?
NO
correctly connect
Yes
NO
LCD Display
On?