I have a ROKU Streaming STICK + that I have had a couple of years and can't seem to get the pause live tv to work. It seems to work on any ON demand shows but not live TV. I installed a 16GB USB thumb drive but did not help. I read a couple of articles on the internet that looks like this has been a problem in the past. If I bought a new ROKU device would this problem be fixed. I there is fix to the one I have I would like that better.
Roku devices in and of themselves have no provisions for saving a buffer of incoming signals which would allow pausing and restarting live tv, so buying a new Roku won't change this.
Some services you use on the Roku which include live tv may provide such a service, but that would involve buffering the signal on their server and then feeding it to the Roku when you resume the program.
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