I'm having issues setting up multiple displays. I have two Dell P2414H monitors at my workstation - one connected via VGA that works with no issues, and another connected with a DisplayPort cable. My setup worked fine without issues until an inter-office move, and now, after the move, the monitor connected via DisplayPort no longer recognizes my computer signal. It powers on without issue, but shows the "there is no signal coming from your computer" message. When I try to switch the input source from "Auto Select" to "DisplayPort", it says it's entering "Power Save mode", and shuts off. Please advise.