Our 65" TV started doing this around 1:00 today. It is now 7:32 p.m.
One of the times it came up with the option to go to do Restart, Update, or Factory Reset. And we chose update. It came back with "update failed". So then we tried to reset it again by pressing the little button on the back of the TV by the HDMI connection multiple times trying our different options for WIFI. But now the only option is UPDATE. It runs through the update and one time got to 99%, but it then just goes back the the onn.Roku screen. We have unplugged everything from the TV, we have unplugged the TV from Power. We have waited different amount of times. We removed it from our list of ROKU devices. It still will not complete the update. Here is the information describing the TV:
Version : CTF.04E12221A
Serial Number X012005G6326
DEVICE ID: SOU4335G6326
HARDWARE ID: G855x
onn Model: 100012587