No Picture on AV1 on Optoma Beamer with Denon Reciver

[warpstarpilot]

I’ve only just had the chance to do some further testing.
I’m using a VGA switch on the VGA input, with a Dreamcast and an analog tuner connected; both work flawlessly.
For the SCART input, I’m using a 9-pin D-Sub switcher. The switches are purely mechanical.
Since I only have one RGB cable for the Master System, that was the only one I could test with; the picture and sound are good, but it doesn’t always work.
After soldering the LM1881 into my 9-pin D-Sub adapter, the digits on the display remain stable, but I have neither picture nor sound, and the LED at the bottom right is lit up red.

If the switchers happen to be the problem, which ones would you recommend for connecting 11 RGB-capable consoles?
I also plan to expand my collection significantly.

 

• This reply was modified 2 days, 1 hour ago by warpstarpilot.

[marqs]

LM1881 typically just adds more issues than it solves unless connected exactly right. It’s futile to blame the switch without knowing its internals, but if you’ve tested various consoles through it without success then the issue can really be on the switch/connection or then the OSSC input is faulty.

Sometimes these kind of switches switch only a subset of lines and just connect others together. Maybe it’s a good idea to open it and check that all 9 lines are truly switched.

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