Question edited for clarity and better written English.
Question moved from Washing Machines to a Tanning Bed Category.
Usually, if a single tube goes out, only that tube is affected. If the ballast fails, they all go out. You can test by swapping parts from the upper to the lower, testing between each replacement.
It is not a particularly well known make here in Canada.
https://www.google.com/search?q=Klafsun+131+Saturn+tanning+bed.+Bottom+bed+lights+won%27t+come+on&
Klafsun.comhttp://www.klafsun.comWe've thought of everything you need. A huge comfortable tanning surface that pampers even the biggest customer. A powerful new generation of lamps that..
..