I have an U49C7006 Android TV from TCL, and while image quality is very good, I'm constantly annoyed with crashes on Apps like Youtube and slowness. The TV takes more than 2 minutes just to boot.
So, is it possible to completely remove Android TV and make it dumb? Or at least to somehow replace it with a lightweight Android version without all the bloatware?
I would suggest factory reset and don't enter any network details so that it stays offline. Like someone else said leave it on HDMI1 with something like a shield or mibox plugged in.
It will hopefully help the boot time somewhat.