LG 37LC7D Connect to VGA from a PC

Your right. I just had the same "Invalid Input" issue as well and it completely relates to the resolution compatability with any VGA or HDMI connection. Check the LG website for the online manual if you don't have it and see the section on RGB-PC cable. There is a table that incdicates the Resolutions the LG product is capable of displaying.

Thanks for the help.

chnage the resolution of your tv to a resolution that your tv holds .I had the same problem with this tv and vga to my xbox 360.I connected the xbox back to a computer monitor and had to reset the resolution.Now it works. Good luck