What is a common sign that a CRT may be malfunctioning?

Flickering images are indeed a common sign of a malfunctioning CRT (Cathode Ray Tube). This symptom can indicate several issues, such as problems with the refresh rate, electrical components, or the CRT itself. When a CRT is functioning properly, it should provide a stable image that does not flicker, ensuring comfortable viewing without strain or disruption. The presence of flickering suggests that there is an inconsistency in how the display is operating, which can detract from the overall visual experience.

In contrast, high-resolution output, stable image display, and perfect color accuracy represent the expected characteristics of a well-functioning CRT. They indicate that the monitor is displaying images correctly and consistently, maintaining vivid colors and clarity, which would not be compromised if the device were operating properly. Therefore, flickering images stand out as a key indicator of potential issues within the CRT.