A:AnswerHi, Roku should work with LG TV connecting to HDMI port and if not working try it with other devices like laptop or PC or different TV. For Spectrum, please try this steps by pluggin in the chromcast and go to google home or download it and add the chromecast and you can mirror the screen. ^Vanessa
A:AnswerHi, Here's the dimensions Width with Stand (Inches) 66.06 in, Height with Stand (Inches) 40.43 in and Depth with Stand (Inches) 14.25 in. ^Vanessa
A:AnswerYes, it does!! I just purchased this TV (LG UP7300PUC 75" 4K Ultra HD 2160p Smart LED HDTV) and I was able to mirror my iPad Pro without any problems.
A:AnswerHello there, the power voltage might not be the issue as you can use a converter however, the issue might occur for the TV turner type like ASTC and might not be compatible, this is for the broadcasting that you might have an issue. ^Vanessa