TCL Roku 55S403TCAA dead after storm

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  • bobbintb
    New Member
    • Feb 2014
    • 6
    • United States
    #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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    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1314
      • United states
      #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.

        Comment

        • williej
          Member
          • May 2005
          • 10
          • USA
          #3
          Re: TCL Roku 55S403TCAA dead after storm

          Maybe this will help
          Attached Files

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            • williej
              Member
              • May 2005
              • 10
              • USA
              #4
              Re: TCL Roku 55S403TCAA dead after storm

              or this.
              Attached Files

                Comment

                • R_J
                  Badcaps Legend
                  • Jun 2012
                  • 9535
                  • Canada
                  #5
                  Re: TCL Roku 55S403TCAA dead after storm

                  The primary fuse is F1 red rectangle box

                    Comment

                    • EazyBone
                      Badcaps Legend
                      • Jun 2023
                      • 1314
                      • United states
                      #6
                      Re: TCL Roku 55S403TCAA dead after storm

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

                        Comment

                        • R_J
                          Badcaps Legend
                          • Jun 2012
                          • 9535
                          • Canada
                          #7
                          Re: TCL Roku 55S403TCAA dead after storm

                          Originally posted by EazyBone
                          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.

                            Comment

                            • EazyBone
                              Badcaps Legend
                              • Jun 2023
                              • 1314
                              • United states
                              #8
                              Re: TCL Roku 55S403TCAA dead after storm

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

                                Comment

                                • bobbintb
                                  New Member
                                  • Feb 2014
                                  • 6
                                  • United States
                                  #9
                                  Re: TCL Roku 55S403TCAA dead after storm

                                  Originally posted by R_J
                                  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.

                                    Comment

                                    • bobbintb
                                      New Member
                                      • Feb 2014
                                      • 6
                                      • United States
                                      #10
                                      Re: TCL Roku 55S403TCAA dead after storm

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

                                        Comment

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