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220-1101 · Question #172

A technician connects an LCD projector to a computer located in a conference room and receives the following error message: Signal out of range. Two minutes later, the projector shuts itself off. When

The correct answer is C. Adjusting the computer's output to a lower resolution. An LCD projector displays 'Signal out of range' and shuts off after connecting to a computer, indicating a display input incompatibility.

Hardware and network troubleshooting

Question

A technician connects an LCD projector to a computer located in a conference room and receives the following error message: Signal out of range. Two minutes later, the projector shuts itself off. When the technician attempts to power the projector back on, it takes more than 90 seconds for the bulb to turn on, and the error message displays again. Which of the following will MOST likely resolve the issue?

Options

  • ARemoving excess dust from the projector's air filters
  • BDecreasing the projector's color temperature settings
  • CAdjusting the computer's output to a lower resolution
  • DMoving the projector closer to the computer and using a shorter video cable

How the community answered

(44 responses)
  • A
    16% (7)
  • B
    9% (4)
  • C
    70% (31)
  • D
    5% (2)

Why each option

An LCD projector displays 'Signal out of range' and shuts off after connecting to a computer, indicating a display input incompatibility.

ARemoving excess dust from the projector's air filters

Removing dust from air filters primarily addresses overheating issues that can cause shutdowns, but it does not explain the 'Signal out of range' error message.

BDecreasing the projector's color temperature settings

Decreasing the projector's color temperature settings affects image color accuracy, not the ability to receive a valid video signal from the computer.

CAdjusting the computer's output to a lower resolutionCorrect

The 'Signal out of range' error indicates that the resolution or refresh rate output by the computer is not supported by the projector. Adjusting the computer's display settings to a lower, compatible resolution will bring the signal within the projector's acceptable range, resolving the error.

DMoving the projector closer to the computer and using a shorter video cable

Moving the projector closer or using a shorter cable addresses potential signal degradation due to cable length, but 'Signal out of range' specifically refers to an unsupported video mode, not general signal quality issues.

Concept tested: Projector troubleshooting - input signal

Topics

#Projector troubleshooting#Display settings#Resolution incompatibility#Signal out of range

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