220-1101 Question 417
Single answerFuzzy imageA user reports that the image on an external LCD monitor connected to a desktop PC appears fuzzy and slightly shimmering, especially when viewing text. The monitor is using a VGA connection and is set to a non-native resolution after a recent system rebuild. Which of the following should the technician do FIRST to correct the issue?
- A
Set the display to the monitor's native resolution and refresh rate
- B
Replace the monitor's backlight assembly
- C
Increase the color depth to the highest available setting
- D
Reinstall the operating system to reload the display subsystem
Show answer and explanation
Correct answer: A
Explanation
For A+ Core 1 display troubleshooting, a fuzzy image on an LCD monitor is most often associated with an incorrect resolution, improper scaling, or analog signal issues such as VGA. LCDs are sharpest at their native resolution because each pixel on the panel maps directly to one source pixel. When a non-native resolution is used, the display must scale the image, which often makes text look blurry. Best practice is to first verify the monitor's native resolution in the monitor documentation or manufacturer specifications, then ensure the OS is configured for that resolution and a supported refresh rate. If the issue persists, the technician should then consider updating display drivers, checking the VGA cable for damage, or using a digital connection such as HDMI or DisplayPort when available, since digital interfaces typically provide a sharper image than VGA.
- A. Correct.
Correct. A fuzzy or shimmering image on an LCD monitor is commonly caused by using a non-native resolution, especially over an analog VGA connection. LCD panels are designed to display their sharpest image at their native resolution. Verifying and setting the correct resolution and supported refresh rate is the first troubleshooting step and aligns with standard display troubleshooting best practices.
- B. Incorrect.
Incorrect. A failing backlight typically causes dimness, flickering, uneven brightness, or no visible image, not a generally fuzzy image with readable but unclear text. This option reflects a hardware replacement approach before checking common configuration issues.
- C. Incorrect.
Incorrect. Color depth affects how many colors are displayed, but it does not normally cause text or icons to appear fuzzy. Someone might choose this option if they confuse poor image clarity with poor image quality overall, but fuzziness is more closely tied to resolution, scaling, or signal type.
- D. Incorrect.
Incorrect. Reinstalling the operating system is excessive and not an appropriate first step for a monitor clarity issue after a rebuild. Display quality problems should be addressed first through display settings, drivers, and cable/signal troubleshooting before considering drastic measures.