I just got a new LG monitor. I had been using it for about 5 days and it was working fine. I got on it in the morning and it was working fine' I got back on it in afternoon and I got a message that said Analog out of range. I do not get any thing on screen. I went back to my old monitor which works fine. Can any one help me.

Double-check your display settings and driver. The screen resolution and the refresh rate need to be within the specifications of the new monitor. However, since it was working and then stopped, I'd speculate the new monitor or cable developed an issue, particularly if you get the message immediately upon initial startup during BIOS POST before the operating system loads and switches to a higher resolution.