A conference-room projector that still shows about 40 % of its rated lamp life remaining suddenly produces a very dim image. Which of the following is the MOST likely reason for the reduced brightness?
The HDMI cable does not support the required HDCP version.
The cooling fan has failed, causing the unit to overheat.
The lamp has reached the end of its lifespan and must be replaced.
The projector is set to an Eco or low-brightness power mode.
Many projectors ship with an Eco or low-power mode that deliberately reduces lamp power by 20-30 % to save energy and extend lamp life. When this mode is enabled, users frequently report the picture is too dark. Therefore, checking and disabling Eco/low-brightness mode is the most probable fix before ordering an expensive replacement lamp. The other options either would not affect brightness (HDCP capability, keystone, etc.) or would create different symptoms such as shutdowns or overheating rather than a uniformly dim picture.
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