My old sceptre tv got 80 antenna channels, my new roku only picks up 3 antenna channels. How do I get the roku to see all of my channels on my antenna. I have rescanned over and over. This TV isn't so smart. ..
May be an internal config on TV (check instructions carefully-US only), or Roku may not be as sensitive and needs antenna amp installed or turned up, or better antenna (contact a local specialist contractor)
UK freeview is simpler config, but can have antenna amp/filter issues (mobile phone interference on repurposed 700/800Mhz bands)