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R e p l a c e
keyboard
N
N
N
Check whether the voltage of the
battery is 0V and Charge for 15
minutes, check whether it is ok
when charge from keyboard
C h ec k w h et h er ba t te r y
connector is good
Check whether USB
connector is normal
Reweld or replace
USB connector
replace b a t t e r y
connector
Y
N
Y
Charging failure
Y
Replace PCBA
check whether it is ok when
charge from tablet
N
Check whether battery is good
replace battery
Y
Y