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Difficulty: HardVideo, Display, and Projector Issues

A technician is dispatched to troubleshoot a ceiling-mounted projector in a corporate auditorium. Presenters report that after 10 to 15 minutes of continuous use, the projector suddenly turns off, and a warning light labeled thermal status flashes on the chassis. The technician verifies that the ambient room temperature is normal and the air intake vents and dust filters are clean, but observes that the internal cooling fan does not spin up when the projector is powered on. Which of the following actions should the technician take BEST to resolve this issue?

  1. Inspect fan power connections and replace the internal cooling fan assembly.Answer
  2. B
    Replace the high-voltage CCFL backlight inverter board inside the projector chassis.
  3. C
    Upgrade the graphics card driver and lower the video resolution on the connected host computer.
  4. D
    Immediately replace the high-intensity discharge projector lamp assembly without further inspection.

Answer

Inspect fan power connections and replace the internal cooling fan assembly.
The correct action is to inspect the fan connections and replace the internal cooling fan assembly. Projector lamps generate intense thermal energy during operation. When the cooling fan fails to spin, thermal sensors register excessive internal temperatures and automatically shut off the unit after several minutes to prevent permanent hardware damage.

Step-by-Step Solution

1
Analyze reported symptoms and physical diagnostics
The projector displays clear video initially but powers off after a consistent timeframe (10-15 mins) accompanied by a thermal indicator light and a silent, non-spinning fan.
Projector lamps generate extreme heat. If active airflow is absent due to a failed cooling fan, heat accumulates until internal thermal cut-off sensors trigger an emergency shutdown.
2
Identify the non-functional component
Clean vents rule out external air blockage, pointing directly to a hardware failure in the active cooling system (cooling fan assembly or fan controller connector).
Fixing the active cooling mechanism directly addresses why heat cannot dissipate.
3
Determine the proper remediation action
Replacing the cooling fan assembly restores proper heat dissipation and prevents automatic thermal protection shutdowns.
Hardware replacement of the defective cooling element is the definitive solution according to CompTIA hardware troubleshooting methodology.

Key Concept

Projector Thermal Shutdown and Cooling System Diagnostics
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Topics

Video, Display, and Projector Issues

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