Key Back Light - Samsung SGH-X640 Service Manual

F low Chart of Troubleshooting

10. Key Back Light

K ey Backlight does not work
Y es
N o
C heck the PM U related to " V D D _K E Y "
U 701 pin 5 = " H " ?
Y es
N o
R esolder or replace U 701
U 701 pin 2,3 = " H " ?
Y es
E N D
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