I have just returned home and my ASUS ProArt monitor (PA248Q, bought in Sept. 2013) will not power on. When I first came home, the power button had a purple light showing and there was no response ...

Next, we used the Blur Busters ghosting test, set to a speed of 960 pixels per second, which tests for motion blur and the resulting artifacts that can manifest as trailing color from a moving object.