Sounds like it's dead then. I have both the Roku and an Amazon Fire Cube. There are advantages to each of them. My wife finds the Roku a bit easier to navigate, but I spend most of my time with the Cube. Roku decided my device was defective, so they sent a new one. It still gets the error, but usually about once a month. The other device was getting it every 30 minutes or so. If your device is completely dead, and it's out of warranty, I guess you're stuck buying another streaming device. We have a smart TV, which seems to have everything available that's on Roku, but it's interface is a bit irritating. You can also plug a PC into the TV, and get practically anything you want. I've watched Netflix, Amazon, CBS, etc, on the PC. I actually started streaming before streaming devices were around, by doing it with the PC. If you're used to Roku, it'll take a bit of adjustment to adapt to the Fire Cube, but it just plain works, and always has worked. That's a very pleasant change from senile Roku devices.
I do have a Roku stick plugged into my PC monitor, and it's not having problems, although it did give the HDCP error, which isn't possible because it does not use any HDMI cables. It only gave the error once, and has been working fine since. They cost around $30.00, I think. Mine came as a part of combination deal, the 4800 and the stick together.
