You might have run through some of these tests, but if you missed any, now would be a good time to re-check them while you are waiting to hear from support.
The yellow button is just a trouble alert, (I think that still holds), and it can be caused by a number of things. It’s going to speed things up for you to eliminate as many of them as possible before support sees your ticket. (And let them know what you checked specifically so they don’t ask you to check it again.)