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keys do not work
keys do not work
Go
Check voltage 3.3V on Front Board R189
Yes
Check Front Control Board signals at XP9
Pin20:LED_SCL, Pin21:LED_SDA
Yes
Replace Touchkey Board
5-2
No
Fix the connection XP9 to XP9 on Main
Board
No
Replace U8 on Main Board, or
replace Main Board
Trouble shooting Chart
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