No picture

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  • November 28, 2018 at 6:40 PM #23985
    magusware
    Participant

    Hi all

    I just got my OSSC today and hooked everything up, fired it up and I have no picture when selecting the source. I can hear the audio but the TV is just black. I have tried following the troubleshooting in the quickstart guide to no success.
    The LCD screen is reporting RGBS 312p 15.59kHz 49.99Hz
    The input is a Super NES (PAL)

    I have tried multiple hdmi cables, and I have also tried it on my PC monitor, still no video.

    Can anyone help?

    Thanks.

    November 28, 2018 at 7:28 PM #23988
    Harrumph
    Participant

    Before you select the source, do you get a gray test pattern screen? This is output in standard 480p and should be compatible with all displays.

    November 28, 2018 at 7:31 PM #23989
    magusware
    Participant

    Yes, I do.

    Sorry, I should have mentioned that.

    November 28, 2018 at 7:40 PM #23990
    SavagePencil
    Participant

    Is the OSSC showing a red or a green light?

    Have you tried a reset to default parameters? Settings opt -> Reset settings ( http://junkerhq.net/xrgb/index.php?title=OSSC#Reset_settings )

    November 28, 2018 at 8:24 PM #23991
    magusware
    Participant

    The light is green, I just tried resetting it now and it didn’t do anything

    November 28, 2018 at 9:44 PM #23993
    nmalinoski
    Participant

    What is the make and model of your display, and does it support PAL and/or 50Hz input?

    November 28, 2018 at 9:49 PM #23994
    Steo
    Participant

    Some displays are very temperamental with the SNES. My 4k set doesn’t work on Lx2 on 60Hz, yet it works at Lx2 on 50Hz. The only way I can make 60Hz work is with Lx3 with tweaked settings.

    What TV do you have?

    Also go to output settings and try different modes for 240p. Line x2 is the default setting, though if you have no picture on that then I doubt other modes would work.

    November 28, 2018 at 10:07 PM #23995
    marqs
    Participant

    SNES at 288p should be fairly compatible, are you sure you’re using a RGB cable?

    November 28, 2018 at 10:21 PM #23997
    magusware
    Participant

    I have a Sony Bravia KD-49XE7002, also tried it on a BENQ GL2450.

    My setup for it is this:
    SNES -> RCA cable -> RCA/SCART Adapter -> OSSC

    The RCA and Scart adapter I’ve been using in the past with an older TV which had a Scart socket, the RCA cable I had plugged into my current TV which also worked.

    If I unplug the video RCA (yellow wire), the display says “No Sync” which is what I’d expect to be honest.
    Thought I’d also test the Yellow in the Y port while I was at it to see if I got a black on white picture on that, and I do.

    My sega saturn works with it.

    November 28, 2018 at 10:36 PM #24002
    nmalinoski
    Participant

    My setup for it is this:
    SNES -> RCA cable -> RCA/SCART Adapter -> OSSC

    That’s your problem. The OSSC only accepts RGB and YPbPr component inputs. Feeding composite video from that yellow plug into a SCART shim doesn’t do any conversion to RGB. You specifically need an RGB SCART cable for your PAL SNES.

    The OSSC will accept composite video, which is why it reports it has valid sync at the expected dimensions and framerate.

    November 28, 2018 at 11:10 PM #24003
    magusware
    Participant

    So what exactly is it receiving then :O.
    I’m not going to lie, I honestly thought there would be no diference in the yellow/red/white into a scart adapter compared to a cable that is scart

    November 28, 2018 at 11:19 PM #24004
    Harrumph
    Participant

    It can extract sync from the composite video signal, but as stated above OSSC needs RGB signal to display video. Just get a sync-on-luma RGB cable and it will work fine.
    You can read up on RGB video and how it differs from composite elsewhere. Scart is just a connector standard, not a video standard.

    November 28, 2018 at 11:25 PM #24005
    magusware
    Participant

    Aye I knew it was a connector, but I honestly thought the snes just output video signal I didn’t realise where was this much to it.
    Thanks for all the help everyone.

    I have placed an order for this
    https://www.retrogamingcables.co.uk/super-nintendo-pal-rgb-av-scart-cable-lead-cord-for-sale?search=luma

    Will message back to say if solved or not when it arrived.

    November 28, 2018 at 11:25 PM #24006
    Steo
    Participant

    Ah yeah that makes a lot more sense then as to why it’s not working. I think I was thinking of 60Hz on the SNES having issues.

    There’s a huge difference also, it’s night and day. A lot of people would argue that composite (yellow) looks like crap compared to an RGB signal. It’s better than RF, but it’s not even close to the quality of RGB. It’s just like a degraded version of S-video with a lot of artefacts.

    Actually I should order one of those myself instead of using the GameCube cable on my SNES because it’s the wrong one for it 😛

    November 30, 2018 at 7:22 PM #24094
    magusware
    Participant

    Thanks a lot all, the cable arrived today and I am happy to confirm everything is working.

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