LG GB210 - KEY Backlight Trouble

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Only for training and service purposes
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
TP1
4.13 KEY backlight Trouble
KEY BACKLIGHT
ICVN0505X150FR
VA400
R412
47
47
R410
LD400
LD404LD401
DNI
C418
LD406
SSC-TWH104-HL
LD405
R408
47
VA401
47
R414
ICVN0505X150FR
LD403
VBAT
47
R411R409
47
LD402
LD407
SSC-TWH104-HL
R415
47
R413
47
LED
TP1