Arcade machines, while built for durability, are prone to several common failure points due to their age, constant use, and complex electromechanical nature. Understanding these issues is key for operators and collectors alike. The most frequent problems originate in a few key areas.

First, the controls are a primary culprit. Joysticks endure immense physical stress, leading to worn-out microswitches, broken springs, or cracked grommets that cause inaccurate or limp movement. Push buttons also fail when their microswitches wear out or become unresponsive.

The display is another major failure point. In classic CRT monitors, capacitors dry out and fail, causing a lack of image, rolling screens, or discoloration. The flyback transformer is also a known point of failure, often requiring specialist repair.

For a machine to earn revenue, the coin mechanism is critical. These are highly susceptible to jams from dirty, bent, or foreign coins. The microswitches that register a coin drop can also fail, preventing the machine from crediting a player.

Internally, the power supply is a common source of problems. Aging capacitors can bulge and leak, leading to unstable voltage outputs. This can cause a myriad of issues, from random resets and graphical glitches to complete failure to power on.

Finally, the game's PCB itself can develop faults. Connector edges can become corroded, and legacy components like ROM chips can work loose from their sockets over time due to heat cycles and vibration.

Regular preventative maintenance, such as cleaning, inspecting for worn components, and recapping old power supplies and monitors, is essential to minimize downtime and keep these classic machines in working order for years to come.