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Insignia NS-LCD26A no VGA or HDMI

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    #1

    Insignia NS-LCD26A no VGA or HDMI

    Hi,

    I recently acquired an Insignia NS-LCD26A TV. The TV works with an antenna feed attached to it. My problem is that since the TV has a VGA input I was considering using it as a large monitor. I connected the laptop to the TV, activated the dual display on the laptop, switched the TV to VGA and nothing, just a black screen with no vga displayed on it. I have also tried connecting a Sony PS3 to the TV through the HDMI ports and got a similar message from the TV.

    I assumed that this inability to display a different input was a fault of the main system board, so I replaced it, nope same problem. Next I tried replacing the power supply (some flickering is noticed when the TV has no signal, but isn't noticed when connected to the antenna). The replacement power supply didn't solve the issue either.

    Does anyone have a suggestion of what I'm missing and what to try next? The TV works fine as a TV, but both the VGA and HDMI do not work (I didn't try the component input). I'm new to diagnosing TV problems, but have been fixing PC's for years. Obviously, I've got some things to learn here.

    Thanks
    Frank
    Tags: None
    #2
    Re: Insignia NS-LCD26A no VGA or HDMI

    Possible faulty main that you bought?

    Comment

      #3
      Re: Insignia NS-LCD26A no VGA or HDMI

      Did you try your laptop on a different TV / monitor with the same cables?

      Comment

        #4
        Re: Insignia NS-LCD26A no VGA or HDMI

        some tvs are strange, my android device won't display on my sony, unless I choose the hdmi port first, have tv on, then turn on the device, maybe try choosing hdmi port, then turning on your device, is your hdmi and pc ports enabled in the menu?, maybe a software update would put it right, if ones available.

        Comment

          #5
          Re: Insignia NS-LCD26A no VGA or HDMI

          Thanks everyone,

          So far I have tried using both the VGA and HDMI ports with no success. The TV turner works fine and I get a picture, but when I connect anything to VGA or HDMI the screen just stays black.

          I have tried entering the reset codes, that hasn't resolved the issue.

          The computer I used for the VGA signal was just used in a presentation. It was connected to a LCD projector and worked fine. I have also tried a second laptop and it didn't work either. (I've even tried different VGA cables).

          I did replace the system board with a different board. No change in the results. It is always possible that the replacement board could have an issue, but it seems unlikely to me that two boards would have exactly the same problem and there be no other conversation on the net about the issue.

          The only significant part left to replace is the T-Con board. It just seems odd to me (but I'm no expert here), that the tuner works fine, but VGA and HDMI do not (I didn't try the composite, nor component).

          Thanks for the suggestions, your input is welcome, this is certainly becoming a learning experience for me.

          Comment

            #6
            Re: Insignia NS-LCD26A no VGA or HDMI

            is that model number correct?, couldnt find any info. on that number at insignia website.

            Comment

              #7
              Re: Insignia NS-LCD26A no VGA or HDMI

              Does the laptop recognize that the TV is there as a second screen?

              Comment

                #8
                Re: Insignia NS-LCD26A no VGA or HDMI

                I tried the Insignia website. I found it when I searched on NS-LCD26. The unit pictured is the set I'm working on.

                The model number printed on the back of the TV does says NS-LCD26A though.

                Comment

                  #9
                  Re: Insignia NS-LCD26A no VGA or HDMI

                  May be the resolution is too high for it to display? 720 is the max res. You will usually see "Format not supported".
                  Last edited by budm; 02-13-2015, 05:50 PM.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment

                    #10
                    Re: Insignia NS-LCD26A no VGA or HDMI

                    Yes, when the VGA cable is plugged into both the laptop and TV, the laptop adjusts its resolution, but nothing on the TV. The only thing that appears on the screen is a box that says "no signal."

                    Comment

                      #11
                      Re: Insignia NS-LCD26A no VGA or HDMI

                      No message of resolution not supported. I've also tried connecting my Playstation 3 to the TV using the HDMI port, again, nothing.

                      Comment

                        #12
                        Re: Insignia NS-LCD26A no VGA or HDMI

                        did you try a different HDMI cable yet?

                        Comment

                          #13
                          Re: Insignia NS-LCD26A no VGA or HDMI

                          Yes, I tried a different HDMI cable. I actually tried a different source for the HDMI signal too, again, nothing. The monitor just says no signal.

                          Thanks

                          Comment

                            #14
                            Re: Insignia NS-LCD26A no VGA or HDMI

                            If everything else on the tv works fine its another faulty main :/

                            Comment

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