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Difficulty: MediumVideo, Display, and Projector Issues

A CAD designer reports that their desktop workstation display exhibits random colored line artifacts and flickering geometric patterns specifically while rendering complex 3D models. The display functions normally during standard desktop tasks like email and web browsing. Which of the following actions should the technician take to diagnose and address the root cause of this issue? (Select TWO.)

  1. Inspect and clean GPU cooling fans and heat sinks to eliminate thermal throttling and overheating.Answer
  2. Test the workstation using a known-good dedicated graphics card or run a specialized VRAM diagnostic utility.Answer
  3. C
    Reinstall the display drivers immediately, as software corruption is the primary cause of load-dependent visual rendering artifacts.
  4. D
    Replace the display monitor's internal backlight inverter board to normalize power delivery to the screen panel.

Answer

The technician should inspect and clean GPU cooling components to resolve thermal issues, and test the workstation with a known-good graphics card or run VRAM diagnostics to verify hardware degradation.
Visual artifacts such as colored lines or flickering geometry that manifest specifically during intense 3D rendering are classic symptoms of graphics hardware degradation or GPU/VRAM overheating. Recommended diagnostic steps include verifying GPU cooling fan functionality and heatsink cleanliness, as well as testing with a known-good graphics card or running VRAM diagnostics to confirm hardware integrity.

Step-by-Step Solution

1
Analyze symptom patterns
Identified that visual artifacts (colored lines, flickering geometry) occur solely during heavy 3D rendering workloads while normal desktop tasks remain unaffected.
Hardware components such as GPU cores and VRAM draw significantly higher power and generate excess heat under 3D workloads, pointing toward thermal or physical hardware faults.
2
Inspect thermal hardware conditions
Check for dust buildup, fan failures, or high operating temperatures on the graphics card.
Overheating GPU silicon or faulty VRAM chips produce visual artifacts as thermal safety thresholds are approached.
3
Isolate hardware components
Swap the graphics card with a known-good card or run dedicated memory test utilities on video RAM.
Replacing or stress-testing the GPU confirms whether physical VRAM corruption or GPU degradation is present.

Key Concept

Identifying physical hardware faults and thermal issues (GPU/VRAM) as causes for load-dependent video artifacts
Estimated Time:1m 30s
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Topics

Video, Display, and Projector Issues

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