I have a ONN 55 inch Roku TV. It's worked perfect for the last 4 years. Now every time I start an app like YouTube or the Xbox for the first time that day about 5 minutes in it crashes back to the Roku screen. It's been happening for about a month now everyday. Any ideas why? By the way, when it crashes if I go do a power cycle and restart the TV it's fine for the whole day.