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1.6.3 Checking Flow
Check Key board
connector is well ?
Check I/O connector
soldering status is well ?
Measure VDD = 2.8V
and pin 5,6 of U1404
signal ?
Check V711 , V712 ,
V713 , LEDs soldering
status is well?
Key backlight will operate properly
Start
YES
YES
YES
YES
NO
Re-assembly or change key
board
NO
Re-soldering or change
component(J1401,KJ101)
NO
Change U1404
NO
Re-soldering component or
change new component
-66-
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