3M X21i - Troubleshooting; Related Messages and Solutions

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3M™ Digital Projector X21i/X26i
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Troubleshooting
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CAUTION
Related messages
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Message Description
There is no input signal.
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The USB TYPE B port is selected as the picture input
source even if MOUSE is selected for USB TYPE B
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The horizontal or vertical frequency of the input signal is
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VRXUFHVSHFV
An improper signal is input.
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Troubleshooting