You are in a conference room where a presenter is attempting to display a presentation from a laptop to a projector. The laptop and projector are both powered on, but the projector continues to display a 'No signal' message. Before checking the physical connections, which of the following should be verified FIRST to resolve this issue?
Replace the bulb in the projector as it may be too dim to display an output.
Switch the laptop to an external display mode using the function keys.
Confirm the projector is set to the correct input source that the laptop is connected to.
When a projector displays a 'No signal' message, it's often due to the data source not being correctly selected on the projector. One should first ensure that the projector is set to the correct input source (e.g., HDMI, VGA, DVI) that is used by the laptop to transmit the presentation. Verifying the projector's input source is a simpler and quicker check before moving to troubleshooting physical connections, which would typically follow if the input source is confirmed to be correct. Changing resolution or display mode, and replacing the bulb, are not related to 'No signal' issues and typically would not resolve the problem.
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What does it mean for a projector to have the correct input source selected?
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How can I determine what input source my laptop is using?
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What steps should I take if the projector is set to the correct input but still shows 'No signal'?