Lenovo A328 Service Manual page 33

LENOVO
Replace dome sheet ,IS
keypad working now?
One or more row/column is not
working?
Check keypad FPC
YES
Measure VBAT voltage
of the backlight
YES
Check the Keypad
Are the component in place and
of correct value/type
YES
Check BBIC
again or replace
Keyboard failure
NO
Check keypad dome
sheet visually
NO
YES
NO
Soldered again or
replace FPC
NO
Check Keypad
signal circuit
pat
h component
Replace damaged/missing
com
soldered
Check the keypad
normal visually
NO
whole row/column is not
Soldered again or
replace BBIC
Measure keypad signal
resistance to GND
NO
NO
Check the Keypad
the component in place and of
correct value/type
Check
END
again or replace
Cleaning keypad
OK?
working?
Check keypad FPC
YES
YES
pat h component Are
YES
BBIC and soldered
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