Lcd display black ,
white ,blurred
Check the EMI device welding is
good
Check the LCD connector
welding is good
Check LCD and connector
contact is good
check signal connectivity
Check whether the normal power
supply voltage VDDIO LCD
END
Re welding of EMI devices
Remove and re welding LCD
connector
Replace the LCD or re welding
LCD connector processing
Re welding or replacement of CPU
and screen display device
Re welding or replacement of CPU
Y
Y
Y
Y
Y
Y
N
N
N
N
N
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