Hi, I'm using an Acer laptop running windows 10. I usually connect a secondary screen to extend my view and work on multiple projects. My secondary monitor is an LG L1942P. I have had no problems with it until I connected a different monitor Acer s202HL, but then decided not to use it for now. Once I connected my LG screen back I got the message saying analog out of range 74.9kHZ/60HZ. I'm familiar with this kind of problem and I tried resetting the video card, changing the secondary screen HZ etc. The issue here though is that my error message is showing up only when I try extending my screen, but not when I duplicate my screen, or use second screen only the screen works perfect. Does anyone have any suggestion on this kind of issue?