A field technician responds to a trouble ticket regarding a ceiling-mounted projector in a corporate conference room. The presenter notes that the projector operates normally with clear video for about 15 minutes, after which it suddenly powers off completely while an indicator light on the chassis flashes red. After allowing the unit to cool down for 20 minutes, the projector can be powered back on, but the shutdown repeats after another 15 minutes of use. Which of the following is the most likely cause of this issue?
- Blocked air intake filters or a malfunctioning cooling fan causing thermal protection shutdownCevap
- BOutdated graphics processing unit (GPU) drivers on the presenter's connected laptop
- CA failing high-voltage backlight inverter board supplying power to the projector light source
- DInsufficient video cable bandwidth causing heat buildup in the video input port
Cevap
Blocked air intake filters or a malfunctioning cooling fan causing thermal protection shutdown
The symptom pattern—normal operation followed by shutdown after 15 minutes, a red status indicator light, and successful operation after a cooling period—is a classic indication of thermal protection shutdown. Dust accumulation on intake filters or a failing cooling fan prevents proper heat dissipation from the high-temperature lamp, causing the internal thermal sensor to cut power to safeguard components.
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Anahtar Kavram
Projector Thermal Shutdown and Airflow Maintenance
Tahmini Süre:1m 15s