That styling of remote, I'm only aware of them being in Silver or Black. Googling back to introduction, SA-7S1 had a pic that was most likely affected by lighting:
Because:
And as their player's codes, most probably, don't have an alternative option, I suggest to perhaps block sensor of Primare (manually operate it)?
If you've a friend who has a Marantz (or Philips) CD remote, borrow it to test… Even their old AV amp remote with CD option can be used to evaluate whether it clashes with Primare.
I sometimes use an old PM-66 KI remote to control their SA players, worked fine for common functions and numbered track selections:
Thats very observant of you! Yes, you'd suppose mine should have been silver, now you mention it. Did they ever make the remotes in champagne colour, do you know?
Better yet, that I could change the codes as it clashes with my Primare amp, and in a weird way. For example, selecting a numbered track on the CD alters the volume on the amp!