Problem LG TV stuck on some kind of test pattern.

Hello. I have a LG 49uh6100 TV. The TV was working fine and all of a sudden went into some kind of test mode/diagnostic where the screen is just cycling between different color screens(red, blue, green, white, etc.) I tried unplugging and plugging back in and it just keeps going back to this screen. Is there some type of way to reset this or is there something internally wrong with the hardware of the tv? Thanks