The old plasma displays used in pinball machines wear out. Usually, it is the display itself that goes bad. Unfortunately, these displays used in early solid state (SS) games are not available anymore. Fortunately, several manufacturers make replacement LED displays. They are not cheap as a set can cost about $250.
There are many advantages to replacement displays. One is that they do not require the problematic high voltage to operate. The second is that they last longer and do not burn-in like plasma displays. Third, they slide in just like the original displays and connect to the same plug as the original. Some can replace a single display, while leaving the old displays in place. Others may require the entire set to be replaced. See the manufacturer for specifics.
Pinscore and X-Pin make virtually identical units. Displays are also made by Rottendog and PinLED. All of these displays are pretty simple to assemble and put together. These photos show Pinscore and X-Pin displays, although Rottendog and PinLED show some similarities. Rottendog use through hole components and include a circuit diagram which may make them easier to repair.
This is intended as a general guide. Prior to proceeding, consult the cautions on the home page. Always consult the manufacturers instructions prior to installations and follow those first.