U2415, stopped working, green/purple flickering dots/lines all over
Hello, bought a Dell U2415 monitor a few weekends ago. I use it with my MacBook Pro and a Lenovo laptop from work through HDMI cables. Randomly, today, I turned the monitor on like usual and it just had a bunch of green dots that flickered on and off, on and off (from green to purple, back to green) then it just flickers off entirely after a few minutes. What is going on???? It does the same thing whether or not I have it connected to a computer. Any help would be much appreciated before I return it. I just can't find anything online like this.