Chosen Solution
why does my roku 3 keep shutting down? Update (09/10/2018) Thanks but I did. Tried different HDMI as well as the three RCA jacks and also 2 different tv’s. I also reset the Roku to factory settings and even then, it shut down while loading all the channels. As I was re-setting it up it accepted the wireless name/password and started to load 1 of 88 channels but shut down while the channels were loading. I unplugged and plugged back in and it started loading 1 of 52 channels then shut down again midstream. Re-booted again and loading 1 of 33… shut down a couple more times but finally completed. After ALL that back to the same thing. after 2 to 5 minutes of watching whatever it shuts down.
Try updating the firmware first: To do this, go to the home screen and enter the Settings. Under Settings, select System, then System Update, and Check now. If an update is available, apply the update and check to see if it will now work.
I read someone’s fix to this, it said it could be a conflicting input or remote from for example a fire stick. He said to take out batteries from other remote( the batteries might be low on either remote). It sounded a little ridiculous. But it worked for me. I’m still not sold but it kept me from doing a factory re+boot and then trying to find passwords from three years ago that I have no way of finding. So take batteries out of other remotes connected to your TV. And remember to always pray to Satan he can kick Jesus'
Try a different HDMI cable. It could be a bad HDMI cable. Roku 3 kepps shutting off for no reason If that does not work, call Roku support as they are available 24/7.
After scouring the internet for possible solutions for the on/off switching problem, I found the one that worked for me was simply unplugging the chrome cast cable from my HDMI switch.
