Tight deadline and hitting a wall - Storyline 2

I have a project with a scene called "Getting Tech-Ready" which at the end of one of the (middle) slides jumps to another scene "interactive" the first slide being "troubleshooting" where the user can click a choice of five buttons to get info, when each sequence ends it goes back to the "troubleshooting slide". We want the user to visit all five slides before a button should appear allowing them to move onward. I've tried many ways but just don't know how to set up the variables well enough to make it work. I cannot use layers because of accessibility compliance. Any help would be greatly appreciated. I've attached the file below.

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