Muse
Lifer
How are the really old machines, from the 1950's? Are they difficult to maintain?I would say the half life of one of the older machines, from the 90's is around 5 hours before a switch breaks.
I can't think of a time I have played a pinball machine in an arcade that something wasn't broken or a light was out. Most of the time you just deal however.
The lights are fairly easy to fix, however are somewhat hard to locate nowdays. Most are automotive lights.