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. ..
Which country? US or UK?
Connection type? cable or OTA antenna
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)