Main Key Led Does Not Work; Key Back Light - Samsung GT-E2232 Service Manual

8-9. Key Back Light

Main Key LED does not work

UCP200 pin L9 = 0 V ?
UCP200 pin L9 = 0 V ?
Yes
(TP:R310)
No
(TP:R310)
No
END
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Yes
Resolder or Replace R310
Yes
8-26
Level 3 Repair
Resolfer U304
or
Resolder UCP200