Sony KD-43X720E - 3.10.2.2 Headphone (HP) Out No Sound

3.10 .2.2 Headphone (HP) Out No Sound
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START
DONE
Change B-board
HP Amp IC (IC3501) or Main IC
(IC5000) problem
Use another Headphone Headphone problem
No Sound, Headphone OK
Sound
No Sound
Check AV Setup,
Headphone is selected
No Sound
Do a Factory Setting &
set to desire channel with sound
Headphone Inserted,
Check J3501 Pin4 Voltage
Replace J3501
No Sound, Headphone OK,
J3501 Pin4 is 3.3V
No Sound, Headphone OK,
J3501 Pin4 is 3.3V
No Sound, Headphone OK,
J3501 Pin4 is 0V
No Sound
Sound
Sound
Sound
3.10 .2 Troubleshooting detail audio problem