Arcade machines, despite their nostalgic appeal and relatively simpler technology compared to modern systems, are not immune to software bugs. These issues can range from minor graphical quirks to complete game-breaking failures. One of the most frequent problems is graphical corruption or glitches. This manifests as flickering sprites, misplaced tiles, or distorted character models, often caused by faulty ROM data, overheating PCBs, or failing video RAM. Another prevalent bug involves input lag or unresponsive controls. Players might find that their joystick movements or button presses are not registered correctly, which can be tied to software polling issues or conflicts within the control interface code. Game freezing or crashing is a particularly frustrating bug. The game might suddenly halt, sometimes requiring a full machine reboot. This is often related to memory leaks, infinite loops in the game's code, or unforeseen edge cases that the original programmers did not account for. Sound-related bugs are also common, including missing sound effects, distorted audio, or complete silence. This can stem from errors in the sound driver, corrupted audio ROMs, or issues with the dedicated sound hardware. Finally, boot failures are a significant category of bugs. The machine may fail to start the game, displaying an error code or a blank screen. This is frequently linked to failed ROM checksums, issues with the file system on modern solid-state replacements, or problems with the master clock signal. While these machines were built for durability, the complexity of their software and the aging of their components make these bugs an inevitable part of the arcade experience. Understanding them is the first step for any collector or technician aiming to preserve these classic games.