been working well for months, but last night the screen started flickering on and off and eventually I had to hold the power button for 20 sec to power it off. when it came back on, it wouldn't recognize the monitor plugged into the Dock, though the one plugged into the Surface itself was fine. swapped the monitors and sure enough, whichever one was plugged into the Dock was blank. I thought maybe the Dock was broken, but when I got to work I plugged it in to the Dock I have here and got the exact same behavior. so I am pretty sure something is wrong with the SP3. probably no one has seen this, but any ideas?