A:AnswerYes. This TV support quadrature amplitude modulation (QAM) digital Turners built in.
This is used to receive digital channels from a cable TV provider without use of a cable box.
A:Answernot sure if you checking channels over air or via cable but try changing the method. We had zero come up, but changed it to "air" and had about 40 channels on just basic cable.
A:AnswerThere are quiet a few channels. When your on your home screen, scroll down to search, type in free movie channels or tv. They will have options. Like haystack that’s a pretty decent. And Roku gives you a free channel because it’s a Roku smart tv. Hope this helps?
A:AnswerNot sure about a slide show, but for OTA tv viewing a flash drive in the usb port will record the show you are watching to freeze or play back.
A:AnswerYes, you need internet access to use features of a Roku. You won't be able to get any programs/channels from a Roku device if you don't have internet service. I've never used cable TV, but I do have internet. I also use an antenna to get free channels "Over-The-Air".