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If you perform the following actions the final result is that the display should be blank:
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1) Display a song
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2) Then use the blank screen button
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3) Then turn off the output display
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4 ) Turn the output display back on
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Instead of appearing blank when you turn the display back on, it displays the last thing that you displayed, but is still in the "blanked" state. This seems to confuse a number of the people on my visuals team as they then asume the screen has "frozen", because they can see words on the screen, but it doesn't respond to song and verse changes. To fix it you just need to unblank the screen, but it still seems to confuse people!
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