Try connecting another "known-good" monitor to your computer.
If it does not work, it's the video-card on your computer that is the problem.
Try connecting the monitor to the VGA-port on a laptop, or to some other desktop. If it does not work, and if it's under warranty, exercise the warranty. Otherwise, it's dead, and you need to buy a replacement, and responsibly recycle the dead monitor.
A quick fix for most communication errors can be achieved by resetting the printer and/or rebooting the PC. Simply disconnect the printer from your computer. Reboot your pc. Unplug and re-plug the printer into the power source to reset it. When the printer turns on, reconnect it to your computer. Then try to print again once the computer fully recognizes the USB connection.
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