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Old 07-04-2020, 10:07 PM   #3
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Join Date: Feb 2010
City & State: S.F. Bay area
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Default Re: Vizio 55" M550SL No volume up or down

Originally Posted by kgavionics View Post
We need more information. Does the volume bar shows when you change the volume?

Also may be there is no sound so they say the Volume doe not work.
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.

Voltage Regulator (LDO) testing:

Inverter testing using old CFL:

Tear down pictures : Hit the ">" Show Albums and stories" on the left side

TV Factory reset codes listing:
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