I have checked everything and can not get my Roku TV activated. Internet connections are secure. I have entered the provided code several times. I have reset, reset to factory and started over several times. I this TV broken or what ?
The first thing to check is to make sure you are connected to the genuine Roku web site. This sounds suspiciously like you are on a scam site. You should be on this site only: https://my.roku.com/link and don't believe what the browser tab says. Make sure that's the exact URL you are on.
If that checks out OK, the next thing to try is using an alternate Internet source. The most successful reports have used a phone hotspot. Connect your Roku to the hotspot and use that until the activation is completed.
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