A large magnet is placed too close to a CRT monitor. Which of the following will MOST likely occur?

Dead pixels are a defect specific to LCD panels where individual liquid crystal cells fail permanently; CRT monitors do not have pixels in this sense and magnets do not cause this effect.

Flickering on a CRT is typically caused by a refresh rate set too low or a failing power supply, not by external magnetic fields.

A complete loss of image would require total disruption of the high-voltage circuitry or electron gun; a nearby magnet typically deflects the beam rather than eliminating it entirely.

CRT monitors use an electron gun that steers beams via electromagnetic deflection coils. An external magnet interferes with the beam's precise directional control, causing electrons to strike the wrong phosphor dots. This produces color bleeding, geometric warping, and overall image distortion. A degaussing coil can correct this if the monitor's shadow mask has been magnetized.