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TCL Roku 55S403TCAA dead after storm

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    #1

    TCL Roku 55S403TCAA dead after storm

    I have a TCL Roku 55S403TCAA. It quit working after a storm. Other electronics quit working as well so I am pretty sure the storm had something to do with it. Anyway, I took a look at it, no obvious damage, blown components, scorch marks, etc. I am looking at the power board first, 40-L141H4-PWG1CG. I've repaired bad caps and blown components but nothing more extensive beyond that. I am trying to troubleshoot it, but I can't even find the fuse on this board. There are markings on the PCB saying "replace fuse as marking" however. I attached a photo of the board. I am also testing the pins but I can't find the standby pin. I don't know if it has a different marking on this board. There are two connectors and the only labels the pins have are GND, 12v, NC, P_DIM, BL_ON, P_ON, A_DIM, and then several LED pins. I'm not sure what to do since I thought every board had those. I'd appreciate any suggestions.
    Attached Files
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    #2
    Re: TCL Roku 55S403TCAA dead after storm

    Usually fuse is right by the AC plug. Maybe I'm not familiar with what this type of fuse looks like. Maybe on bottom ? It says it on the board. And lightning can also run up the HDMI inputs also so main board could be damaged also. Check around HDMI connectors for shorts as well (if that was a possibility)

    Edit, that disc may be the fuse actually but not sure
    Attached Files
    Last edited by EazyBone; 11-19-2023, 05:18 PM.

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      #3
      Re: TCL Roku 55S403TCAA dead after storm

      Maybe this will help
      Attached Files

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        #4
        Re: TCL Roku 55S403TCAA dead after storm

        or this.
        Attached Files

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          #5
          Re: TCL Roku 55S403TCAA dead after storm

          The primary fuse is F1 red rectangle box

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            #6
            Re: TCL Roku 55S403TCAA dead after storm

            Originally posted by R_J View Post
            The primary fuse is F1 red rectangle box
            Thanks, was curious as well. Do you know what this type of fuse is called?

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              #7
              Re: TCL Roku 55S403TCAA dead after storm

              Originally posted by EazyBone View Post
              Thanks, was curious as well. Do you know what this type of fuse is called?
              Little fuse 392 series or mst micro fuse, radial box some call them a dip mounted fuse. or TE5 fuse
              Last edited by R_J; 11-19-2023, 09:08 PM.

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                #8
                Re: TCL Roku 55S403TCAA dead after storm

                Thanks, I googled those and they all came up. Appreciate it

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                  #9
                  Re: TCL Roku 55S403TCAA dead after storm

                  Originally posted by R_J View Post
                  The primary fuse is F1 red rectangle box
                  Ah, thank you. I looked right at it several times but I've never seen that type of fuse so I didn't notice.

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                    #10
                    Re: TCL Roku 55S403TCAA dead after storm

                    Originally posted by williej View Post
                    or this.
                    Thanks. I found the first one but the model number was different so I wasn't sure if it was sufficiently similar.

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