Welcome to the forum. What model is your Vegas? There are lots of helpful folks here, with a lot of experience and knowledge.
The "Store" button will disable the interior lights. Do the other lights in the coach work? Fuses can fail, but I am guessing you have a loose wire issue. Report back what you find and the fix.
It probably won't help with this issue, but you'll benefit from Ed Felker's excellent crowd-sourced manual. It's easy to find on a sticky in the main menu.
If all else fails, read the directions!!