JBL FLIP 3, Service Manual

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Trouble shooting Chart
keys do not work
Keys do not work
Go
No
Check 3.3v of U1 PIN5 in main board .
Yes
Replace the U3 in the main board.
Yes
No
Check Q1 Q11. whether has it
breakage or plug in well?
Check XP4 10PIN FFC in main board
whether has it breakage or plug in well?
Fix or replace the 10PIN FFC
Yes
Replace the Q1 Q11 in the main
board.
No
Replace the Key board.
5-2