A customer calls and states that on two corners of their screen all the colors are distorted, but if they move the monitor forward or backwards the image is fine. Which of the following is the MOST…

Question

Options

• AVideo cable is going bad
• BThe HDMI cable is coming loose
• CThe display needs to have the geometry adjusted
• DSpeakers were placed too close to the display

• B
  3% (1)
• C
  3% (1)
• D
  93% (27)

Explanation

This is a classic symptom of magnetic interference affecting a CRT (cathode ray tube) monitor. CRT displays use an electron beam that is directed by magnetic fields. External magnets - such as those inside traditional speakers - can deflect the electron beam, causing color distortion and discoloration, typically in the corners where the beam travels farthest and is most susceptible to interference. Moving the monitor forward or backward changes the distance from the speakers, which alters the magnetic field strength experienced by the monitor and temporarily relieves the distortion. Modern LCD/LED monitors are not susceptible to this, so this is a scenario involving an older CRT. The other options are incorrect: a bad video cable or loose HDMI cable would cause signal issues across the whole screen or flickering; geometry adjustment corrects shape/alignment distortion, not color distortion caused by external forces.

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