I have a refurbished U2412M that I have had for about 10 days that worked perfectly until last night. My laptop went to sleep and now the monitor will not show a picture. The power light is blue and the on screen menus will not come up either. This happens even when not connected to anything. When connected to my laptop, the laptop thinks that the monitor is connected but there is again, no picture. I have tried multiple connections, but my normal connection is DP. Any thoughts?
lenovo X230 and Dell U2412M
