This probably means it tries to do the “device detection” when you switch inputs or plug in a new device. Tbh this is the worst feature for me, it’s exceptionally hard to get rid of even with access to the factory menu. I can blackhole my TV all day on the network, but this problem is persistent.

Also as a note, it’s become increasingly difficult to root TVs. Even getting firmware can be a chore, and forget getting anything other than a bootlog over RS232.