I thought I’d already asked this question, but i can’t find it or a reply?
From where I am sitting it looks like one cannot display a header image on the Landing Page with the Slider active.
You can have one or the other — but not both.
Is this correct?
Yes, that is correct – the theme can display the header image or a banner image or a slider or nothing at all in that landing page section, but not several at once.
If you need both the header image and a slider (and don’t need the rest of the landing page) you can disable the landing page functionality, use a static home page and insert the slider inside the page content.