MEGAPOWER MVP-886 - Manual (Page 31)

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14 Solution of black screen (in 1080p format)
This problem may be occurred when the output signal is in 1080p
format; even restarting the visualizer can’t fix it. It’s because some
display device can’t accept 1080P format. To solve this problem,
you need to follow these instructions:
1. Release the visualizer power plug.
2. Hold on the POWER button, and then plug in the power cable.
3. Now you can carry on further operation.