220-1201 Practice Question: A technician is troubleshooting a display that…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  The monitor's response time setting is too low.

  Why it's wrong here

  Monitor response time specifies the speed at which a pixel can change from one color to another, typically measured in milliseconds (GtG or MPRT). A low (fast) response time setting is designed to minimize motion blur and ghosting artifacts during fast-moving scenes, not to cause them. Therefore, a static ghost image or "burn-in" effect is unrelated to this setting, as it pertains to the panel's ability to retain a previous static image rather than its pixel transition speed.

• ✗

  The video cable is causing signal interference.

  Why it's wrong here

  Signal interference in a video cable typically introduces random visual noise, static, flickering, or distinct lines and color distortions across the entire display. These artifacts are usually dynamic and directly related to the current signal's corruption. A persistent, static ghost image of a previous display, which might gradually fade, is not characteristic of signal interference but rather an issue with the display panel's ability to properly refresh its pixels.

• ✗

  The monitor's refresh rate is set incorrectly.

  Why it's wrong here

  An incorrectly set refresh rate, particularly one outside the monitor's supported range, usually manifests as a blank screen accompanied by an "Out of Range" error message, severe screen flickering, or noticeable screen tearing. The refresh rate governs how frequently the display updates its image from the video source. It does not cause a static ghost image of a previously displayed element to remain visible on the screen, as that points to a physical characteristic of the panel's pixels.

• ✓

  The LCD panel has image retention or burn-in.

  Why this is correct

  Image retention, often referred to as "ghosting" or "temporary burn-in," occurs when the liquid crystals within an LCD panel fail to completely revert to their original state after displaying a static image for an extended duration. This phenomenon results in a faint, residual outline or "ghost" of the previous image remaining visible on the screen, which typically fades over time if the display shows dynamic content. The persistent "2" described is a classic symptom of this panel characteristic, indicating a physical issue with the display's pixels.

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