Sony KD-55A8F Service Manual page 36

3.0 No Sound
No Sound
Without LED 3x
Yes
AV receiver is connected
to HDMI in ?
No
[Speakers] setting is
Yes
[Audio System] ?
No
Headphone is connected to
HP/Audio Out terminal ?
No
[Sound]→
[Headphone Speaker Link]
setting is [On] ?
No
Go to
3.3 Power Off Checking
Select [External Inputs]→
[BRAVIA Sync Settings]→
[BRAVIA Sync Control]→[off]
Change the setting to
[TV Speakers]
Yes
Disconnect the Headphone
Change [Sound]→
[Headphone Speaker Link]
Yes
to [Off], OK ?
Yes
Replace BM2A board
HP/Audio out terminal or Headphone
detect GPIO may be broken
No sound only
Analog RF and Digital RF ?
No sound only HDMI ?
Go to
3.1 No Sound Audio
No
Yes Go to
3.7 No Sound Tuner
No
Go to
Yes
3.8 No Sound HDMI
No
36
SYS SET