A desktop support technician is categorizing common display issues reported by office users. Match each video display symptom on the left with its primary root cause on the right.
- Dead pixels on the monitor screenPermanently unlit sub-pixels hardware defect in the LCD panel
- Overall image color tint (e.g., missing blue or red)Bent signal pins or a loose connector on an analog video cable
- Trapezoid-shaped projected image on a screenPhysical projector misalignment requiring keystone adjustment
- No image on display, but monitor power LED indicates active powerDisconnected signal cable or wrong display input source selected
Answer
Dead pixels correspond to defective sub-pixels within the display panel. Color tinting corresponds to bent pins or loose connections on the video cable. A trapezoid projected image corresponds to improper projector angle needing keystone adjustment. A black screen with monitor power active corresponds to a missing video signal or incorrect display input selection.
Each display symptom maps directly to its specific component failure: dead pixels represent permanent panel transistor failures, missing color channels indicate broken or bent video cable signal pins, trapezoid projection results from surface misalignment fixable via keystone settings, and a blank display with monitor power active indicates an absent video signal or misconfigured input channel.
Step-by-Step Solution
Key Concept
Identifying root causes of common video, display, and projector hardware symptoms.