Murray has an Apple TV 4K and it's not working with his LG TV unless he reboots it. Leo says it's probably an HDMI handshake issue. It could be a bad HDMI cable. Or worse, a bad HDMI port. Apple says to hold the menu/volume buttons down for 5 seconds. The Apple TV will run through resolutions until one wakes it up.
Apple TV 4K
Matt's 4K Apple TV runs for an hour and then shuts down. Leo says that it's possible that the TV is overheating and it shuts down as a protective measure. So Matt should make sure there's plenty of airflow. He can also use canned air to blow out any dust accumulation. There could also be a memory leak that's causing it to crash. Leo really recommends making a Genius Bar appointment at the Apple store to tell them it's overheating after an hour. Since it's still under warranty, they could just give him another one.
Leo got the Apple TV 4K yesterday and says it looks really good. Scott says there's some really great stuff in it and he thinks it could be a Roku killer. It's very polished and crisp. Scott says that the one problem the Apple TV 4K has is that the up conversion feature isn't the best and as such, anything you watch that isn't 4K at 60p doesn't look all that great. Apple is planning to address the problem with a TVOS firmware update 11.02 which will feature "auto switching" that will fix the up convert problem.
This week, Apple christened the new Steve Jobs Theater at Apple Park with the announcement of the LTE version of the Apple Watch Series 3, which shares your iPhone's phone number and will work independently from the phone. The Apple TV will be 4K with HDR, and 4K movies will be the same cost for rental and purchase. Any HD titles you already have will be automatically upgraded to 4K as well.