Vizio M3D420SR Dead

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  • ny_jets_head
    Senior Member
    • Apr 2014
    • 70
    • usa
    #1

    Vizio M3D420SR Dead

    Dead.. Makes a high pitched that seem to be coming from the power supply board. PS voltages all look good. No lighted Vizio Not sure it lights up on this one. When I unplug the Main board the high pitched squeal goes away.

    Mainboard issue? Looks like it.
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Vizio M3D420SR Dead

      Pictures of the boards?
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • ny_jets_head
          Senior Member
          • Apr 2014
          • 70
          • usa
          #3
          Re: Vizio M3D420SR Dead

          Here ya go!
          Attached Files
          Last edited by ny_jets_head; 09-04-2014, 04:55 AM.

            Comment

            • ny_jets_head
              Senior Member
              • Apr 2014
              • 70
              • usa
              #4
              Re: Vizio M3D420SR Dead

              Update:

              Sent the mainboard for repair to an ebay vendor and he could not fix it.

              It appears this is a very common issue and new mainboards are impossible to find as well as working used versions.

              I will try a bit longer to get one but I may end up tossing this one back in the junk pile.

                Comment

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