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Difficulty: MediumVideo, Display, and Projector Issues

A technician is troubleshooting a desktop workstation used for 3D modeling. The user reports that after running heavy graphics rendering tasks for several minutes, the screen displays random multicolored dots and geometric distortion across the display, immediately followed by brief blackouts. Which of the following hardware issues are the MOST likely causes of these symptoms? (Select TWO.)

  1. Overheating or failing Video RAM (VRAM) modules on the graphics cardAnswer
  2. B
    Corrupted monitor device driver files within the operating system
  3. Excessive GPU core temperature leading to thermal throttling and temporary video signal lossAnswer
  4. D
    Faulty CCFL backlight inverter board inside an OLED display panel

Answer

The most likely causes are overheating or failing Video RAM (VRAM) modules on the graphics card, and excessive GPU core temperature leading to thermal throttling and temporary video signal loss.
Visual artifacts (such as random colored dots, tearing, or geometric distortion) under heavy graphics rendering are classic indicators of overheating or failing VRAM on the discrete graphics adapter. Additionally, excessive thermal buildup on the main GPU core triggers thermal throttling and transient GPU recovery resets, which manifest as temporary screen blackouts.

Step-by-Step Solution

1
Analyze reported symptoms
Identified load-dependent visual artifacts (colored dots and geometric distortion) combined with sudden screen blackouts under intensive GPU workloads.
Symptoms that occur specifically during intensive 3D rendering indicate hardware heat saturation or component failure on the graphics adapter.
2
Evaluate hardware memory and thermal factors
Determined that VRAM degradation/overheating produces artifacting, while GPU core overheating leads to thermal protection triggers and brief signal loss.
VRAM holds frame buffer data directly; errors in frame memory generate visual corruption. GPU overheating causes thermal shutdown or reset of the display engine.

Key Concept

GPU and VRAM Thermal Troubleshooting
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Topics

Video, Display, and Projector Issues

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