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The speaker's laptop may have different video output ports than what your AV setup supports, leading to a physical connection failure.
Older or newer versions of presentation software, or specific features within the software, might not be compatible with the display drivers or hardware of the AV system.
Outdated or incompatible graphics drivers on the speaker's laptop, or specific operating system settings, can prevent proper display output.
Problems with the audio or video signal itself, such as resolution mismatches or signal degradation over long cable runs, can cause display problems.
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