I am using a Roku express I purchased last fall from Best Buy.
It is running with supplied USB cable and power supply.
The unit was unused since late May while I was away.
Since I returned home at the beginning of July, the unit reboots itself about every 3 (or so) minutes.
This happens no matter what content/channel is being played.
Searching for this problem in the forums and internet, I saw many reports of this behavior over the last few years. The solutions were always to delete the offending channel, reboot the roku, and re-install the channel.
I did this. I removed ALL channels, rebooted, and installed ONLY YouTube.
It still rebooted itself every few minutes.
Again, on advice from the internet, I did a factory reset, installed a couple of channels and tried again.
It still reboots about every 3 minutes.
I have tried other power supplies with no change in behavior.
I have tried two different wi-fi networks, both connections previously worked, with the same behavior.
I have let the express sit over night unplugged and it begins rebooting a few minutes after you start a stream, so I doubt it's a heat issue.
I then went to Best Buy and purchased another Roku express.
I installed it with the new power supply and cables and linked it to my account.
As part of its installation, it did a software update.
It rebooted every 3 or so minutes.
I returned it the next day.
On these forums, it appears that this problem is occurring on Roku sticks, Roku 4's, and Roku TVs in recent months.
I did software testing on medical equipment for many years. This sure seems like a software defect.
Is there any hope of a solution?