Summary: Purchased new, but was unused for over a year. Has less than two hours of use now. It turns on and starts fine, connects to a laptop fine, but about 10 minutes later one of two things happen: 1. The screen will go blank. A black and white checkerboard/line/strange shapes appear and the unit will not shut down/power off, and none of the menu or other buttons will work. The lamp is still lit during all of this. The unit need to be unplugged. Or 2.