Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
In addition to the hdmi plug, are you connecting the stick to the tv via a usb cable, or to a separate power outlet?
This was not a yes or no question, which are you using?
OKay that indicates a firmware glitch or a hardware fault in the roku.
Unplug both the hdmi and the power connections, leave disconnected for a few minutes, then replug and let me know if the roku comes back up for you at that point.
If the problem happens only on pureflix, that is an app specific or server issues, not a roku hardware issue.
Can you test if other apps are working?
Wifi is the internet signal source, not a power source.
Can you go into the roku settings and look for the software update function, it may simply need an update, or there may be a problem with your wifi signal
Okay go ahead and check for the software update, please.
If possible moving the router closer, or testing the roku on another tv that is closer to the router would be helpful too
OKay well at this point it can only be an internet speed issue or a roku software issue then, chances of 2 hardware components failing is very little.
Unplug power to your router for a few minutes to reset it as well.
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