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Neo Geo MVS output sync 59.41hz issue

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This topic contains 6 replies, has 3 voices, and was last updated by  Roborodriguez 7 months, 1 week ago.

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  • #20087

    Roborodriguez
    Participant

    Hi all does anyone have any fixes at all, I have a Sony kdl55w829B and Neo Geo consolised MVS and I’m not getting any imagine at all it just says no signal. It works fine on 2 other Cheap TV’s and a monitor. The only way I can get it to work is to pass the signal through a cheap eBay hdmi upscaler to pass through the OSSC signal. Seems stupid and picture quality is degraded. The out signal is is between 59.37-59.43hz I don’t know if that is the issue or not, can anyone help please?

    #20088

    nmalinoski
    Participant

    Does the MVS work when connected directly to your Sony TV? (I’m assuming you’re using RGB SCART, and the manual for your TV says it has a SCART input.)

    I suppose it’s possible that your TV simply doesn’t like the resolution and/or refresh rate that the OSSC is outputting. What resolution/refresh rate do your other TVs and monitor report when you have the MVS+OSSC hooked up to them?

    #20089

    Harrumph
    Participant

    NeoGeo outputs 264 lines (262/263 is the norm), and some displays do not accept more than +/- 1 deviation from the normal 525 of 480p. The Sony W series is notorious for this, hence why lx3-5 is out of the question also. I suppose you could try passthrough though.

    #20098

    Roborodriguez
    Participant

    It’s mad it works fine hooking up mvs via scart to tv absolutely fine, put it through OSSC and no signal. I’ve looked at the screen when it’s going through he hdmi upscaler and it’s outputting a 1279x723p signal just out of range. It differs a few points if I play with settings I’ve got it to 1279×720 but the tv just doesn’t like it. The refresh once out of the hdmi upscaler is 60hz but from the the OSSC it is 59.37/43 the upscaler takes it to 60hz. I thought that might be the issue but mvs via scart to tv works fine and that is obviously outputting at that range.

    #20099

    Roborodriguez
    Participant

    Plus it won’t even pass through it’s really weird, the hdmi requirements for resolution and signal display must be more strict than scart connection.

    #20100

    nmalinoski
    Participant

    It’s fairly normal that TVs will not support the same resolutions/frequencies over all inputs, and this is likely due to different inputs having different processing pipelines before hitting the screen.

    For example, with my Samsung 32″ TV, circa 2009, composite, component, and HDMI likely all have their own processing pipelines, because the TV will accept 240p (and not deinterlace it) over component, but it will see it as 480i over composite, and it will outright refuse 240p over HDMI.

    It sounds like the HDMI upscaler is resampling the image to be 60Hz, in which case you might begin to notice some periodic judder.

    Probably should’ve searched first thing, but here’s a thread about OSSC settings for use with the MVS, and it looks like that links to yet another thread with further suggestions.

    #20101

    Roborodriguez
    Participant

    Yeah really don’t want use cheap upscaler thought I could chuck it. Thanks bud love ossc think I might need a new tv lol. Just didn’t know if there was any magic settings I could play with on the ossc to get it through the tv.

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