OSSC Pro Extra AV Out Steam Deck to CRT

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  • November 2, 2026 at 6:31 PM #71114
    Hayden
    Participant

      Hi there!

      I am having a devil of a time trying to connect my Steam Deck to my CRT. I have a Sony Trinitron that I’ve connect the OSSC Pro to via the Extra AV out with component cables.

      I can see the test pattern on the CRT, but whenever I switch the OSSC to the AV4 HDMI input, I get a black screen. My steam deck does pick up the OSSC as a second monitor.

      Has anyone tried this, or have any suggestions?

      November 2, 2026 at 6:49 PM #71115
      BuckoA51
      Keymaster

        Are you sure you’re outputting a resolution your CRT can support?

        November 2, 2026 at 6:59 PM #71116
        Hayden
        Participant

          I think I am, so far I am just trying 480i.

          November 2, 2026 at 7:23 PM #71117
          marqs
          Participant

            What resolution Steam Deck tries to output? Does the Pro front screen just indicate NO SYNC, or oscillate between modes with red LED on?

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