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    A New Chapter for MagicMirror: The Community Takes the Lead
    Read the statement by Michael Teeuw here.

    Display sendet "Kein Signal" anstatt sich auszuschalten

    Scheduled Pinned Locked Moved Unsolved Troubleshooting
    12 Posts 5 Posters 5.4k Views 4 Watching
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    • A Offline
      AxLed Module Developer
      last edited by

      see english text below
      Ich hatte ein ähnliches Problem mit meinem LG Monitor, die Lösung ist zwar nicht schön aber funktioniert.
      Der Monitor verhält sich bei Grafiksignaltrennung unter VGA anders als unter HDMI, so habe ich mir einen HDMI->VGA Adapter am Pi angeschlossen und den Monitor mit VGA verkabelt, so geht es wie es soll (kein Signal Meldung nur für wenige Sekunden).

      Keine Angst bei VGA, VGA kann auch FullHD Auflösung.

      Gruß

      AxLED


      I had a similar problem with my LG monitor, the solution is not nice but works.
      The monitor behaves differently in graphic signal shutdown under VGA than under HDMI, so I have an HDMI-> VGA adapter at the Pi connected and wired the monitor with VGA, it works as it should (no signal message only for a few seconds).

      Do not worry at VGA, VGA can also use FullHD resolution.

      Regards

      AxLED

      1 Reply Last reply Reply Quote 0
      • C Offline
        Canberra
        last edited by

        Das werde ich morgen Abend versuchen und gebe ein Feedback. Danke

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        • C Offline
          Canberra
          last edited by

          Ich habe am Pi nun einen HDMI–>VGA Adapter angeschlossen. Das Ergebnis bleibt dasselbe. Nach einiger Zeit schaltet sich nicht nur das Display aus, sondern direkt das ganze Board, welches ich dann nur noch über die Fernbedienung starten kann.
          Ich nutze die gleichen Befehle und in der /boot/config.txt habe ich nichts geändert…

          Ein Test mit einem anderen Monitor ist erfolgreich, er schaltet aus und wieder ein (mit HDMI–>VGA Adapter), wie ich es mit dem PIR Sensor vorhatte. Aufgrund der Bauweise des Displays kann ich dieses aber nicht verwenden.

          Es scheint, so als ob ich mich von dem Display und dem Board trennen müsste. Kennt jemand eine passende Kombination oder hat eine Empfehlung für ca. 100 Euro?

          Danke

          M 1 Reply Last reply Reply Quote 0
          • M Offline
            MadScientist @Canberra
            last edited by

            @canberra Can you tell us what controller board exactly you have? You mentioned a remote. Is it correct to assume you a universal controller board like the V56 boards? If so, you’ll need an extra relay to power on/off the display. Although it should power off normally once there’s no HDMI signal anymore. @cruunnerr wrote a very detailed guide on how to use a PIR sensor with your mirror. It offers lots of possible pathways and they are very well explained. Have a look.

            Offtopic: Even with a broken English you might get better help than asking in German only.

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            • C Offline
              Canberra
              last edited by

              Okay, i hope it isn’t to late. From now i’m going to write in english.

              Yes, the Controller is a V56.
              Here is the ID: R17112253-GA00668
              M215H1-L03 (1920x1080) V56.

              I also found a hint to switch the display with an extra relay. When it is the only way, then it has to be…
              I hoped there would be an easier way.

              I will check the guide of @cruunnerr.

              Thanks a lot!!

              M 1 Reply Last reply Reply Quote 0
              • M Offline
                MadScientist @Canberra
                last edited by

                @canberra The display should at least power off once there’s no HDMI signal detected anymore. It’s a bit weird it doesn’t do it in your case. However, it wouldn’t power back on after the HDMI port has been activated again. Therefore you’ll need a relay for sure.
                It’s working really great in my case. I’ve got the PIR-sensor and the relays from AliExpress for just a couple of cents. You can also try those 12V PIR-Sensors, that you plug in between the power supply and your LCD controller board. It’s not working in my case, though. Looks like some signal noise keeps it awake all the time.

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                • C Offline
                  Canberra
                  last edited by

                  Thanks.
                  The Pir is also working fine in my case.
                  I’m going to buy a relay and then i will see.

                  Kind regards

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                  • M Offline
                    MaxxMagic
                    last edited by

                    Konnte das Problem mittlerweile gelöst werden?

                    Ich habe nämlich das gleiche Problem und überlege auf ein anderes Board umzusteigen ein VGA Board von Pollin evtl. kann dies das Problem lösen.

                    LG

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                    • M Offline
                      MaxxMagic
                      last edited by

                      If it is still in progress. Use this board:

                      https://www.pollin.de/p/lvds-interface-pi-mt6820-vga-zu-lvds-810220

                      5€and it is working perfect!

                      Best,

                      MaxxMagic

                      A 1 Reply Last reply Reply Quote 0
                      • A Offline
                        Antibraatz @MaxxMagic
                        last edited by

                        @MaxxMagic said in Display sendet "Kein Signal" anstatt sich auszuschalten:

                        MaxxMagic

                        Hello MaxxMagic, that sounds very good. I also tried to turn off my mirror with the T.V56 board via the PIR module, which doesn’t work, the display stays live and lights up like a bedside lamp. Switching it on again is only possible with the remote control of the T.V56 board.
                        Can you tell me about your suggestion of the LVDS interface PI-MT6820, VGA to LVDS, how to connect it afterwards? Do I also have to order a cable in the shop?

                        Greeting
                        antibraatz

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