I recently got an S-video cable for my PAL N64 from consolegoods.co.uk. It looks great on my CRT; much better than composite and way ahead of RF. The trouble is that on every HDTV I've tested it with, I get a weird rainbow effect with the colours.
The video shows what I mean:

Any suggestions? With both the CRT and the HDTV I'm using an S-Video/composite to SCART adapter.

2 Answers 2


It looks like you need to change your TV from progressive scan to interlaced (or vice versa as applicable).

I've seen flickering like this from this problem before, and here's why it happens:

There are 2 ways to feed data to a TV. Progressive scanning sends it one line at a time, 1st, 2nd, 3rd, and so on. Interlaced scanning sends all the odd lines, then all the even lines, 1st, 3rd, 5th, ..., 2nd, 4th, 6th, and so on.

If you have your TV in the wrong mode it could cause this.

  • 1
    It's an LCD HDTV, it deinterlaces all SD video before displaying it anyways.
    – ferg92
    Apr 1, 2016 at 13:46
  • Hmmm, odd. Mine don't do that. Eh, try it anyways it may help.
    – Daniel
    Apr 1, 2016 at 13:51

On my HDTV I set the output to 'SCART-S', this means the s-video cable can run through my scart adapter and into my tv via scart. The problem you have is that your output is set to SCART and not SCART-S. Once you've changed this, it should fix the rainbow effect. If you don't have this option on your TV however, then you may have to find a TV that does.

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