TCL. Roku doesn't manufacture the TVs. Roku leases the Roku software to TCL and other companies for their smart TVs. Although I suspect a TV that old is out of warranty, unless you purchased an extended warranty.
Before you declare it a loss, answer how you did a factory reset. What did you do to initiate a reset, and for how long (if applicable)?
Roku Community Streaming Expert
Note: I am not a Roku employee.
If this post solves your problem please help others find this answer and click "Accept as Solution."