A technician is asked to troubleshoot a conference-room projector that is producing a noticeably dim image. Which of the following statements accurately describes a likely cause of this symptom?
A dim image always indicates that the bulb has reached the end of its lifespan.
Replacing a projector lamp automatically resets the lamp-hour counter on most models.
User-adjustable Eco or power-saving settings do not affect image brightness.
Dust or dirt inside the projector's optical path can significantly reduce the brightness of the projected image.
Correct: Dust or dirt on internal optical components can block light and cause a dim image, so cleaning the optical path is a valid remedy.
Incorrect options:
The lamp is one possible cause, but a dim image is not always caused by an aging lamp.
On most projectors the lamp-hour counter must be reset manually after the bulb is replaced; it does not reset itself automatically.
Selecting Eco or power-saving mode purposefully reduces lamp power, so user settings can affect brightness.
Therefore, the dust-related statement is the only fully accurate option.
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