Vizio VP505XVT1A Series Service Manual page 27

Is Video
Processor
normal?
Yes
Panel Fail
AUDIO NO SOUND (ANY MODE)
Start
Is Audio Normal?
CONFIDENTIAL – DO NOT COPY
Video Processor
No
Fail
No
Check Audio Input
Signal Normal?
Check U75 Signals
Normal
Check U83 Signals
Normal
Speaker Fail
No
Source Fail
Yes
No
U75 Fail
Yes
No
U83 Fail
Yes
Page 10-2
File No. SG-0283