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9-1-2. LCD Working
Power Switch On
LCD Display
On?
Yes
C714
LED+_23V= 23V?
Yes
LCD
Replace U707 & Check
Replace
neighboring circuits
NO
Yes
NO
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LCD FPCB
connector is co
rrectly connecti
ng?
Yes
F803, F804,
F805 Correctly
mounted?
Yes
VLCD_3.0V =3.0
3rd pin LCD_EN
Yes
U709
Replace
9-3
Flow Chart of Troubleshooting
correctly connect
NO
F803, F804, F805
Resolder
NO
C718
V?
NO
U709
= High?
NO
UCP400
Replace
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