If you can connect your TV to your network via Ethernet cable, then you may be able to use the mobile app as a remote, but I don't know if that will work after a factory reset. I have a TCL Roku TV that hasn't completed its setup and while it shows up on my network when I connect an Ethernet cable, I can't seem to communicate with it. The USB port is useless.
Let's go back to the remote. Which one did you try? Are you aware that you need a TCL remote? The Roku simple remote won't work with any Roku TV and remotes from other brands of Roku TVs may not work. You should be able to get a Roku Voice Remote to pair with the TV and there are many universal remotes that support Roku TVs.
The Voice Remote or Voice Remote Pro may be your best options if the IR receiver is questionable. You can get one online or many big box stores have them.
Accessories | Roku Player, Streaming Stick, Smart TV & Audio Accessories | Roku
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.
