Problem for Sylvania LC195SLX LCD TV Channels will not program in tv.check with different tv it works

It looks like your TV doesn't have a digital tuner in it. Without that you won't be able to receive any broadcast television stations. The spec sheet is here: LC195SLX the tuner is listed as just ATSC/NTSC - not digital. You will need a cable or satellite box to receive stations.

This model (LC195SLX) TV has both RCA and HDMI inputs in addition to the RF coax connection. My problem is similiar, autoscan does not find any channels, however the HDMI and RCA inputs work. I suspect the main board having the coax connector is the problem, am I correct??? How do you remove/replace the cables that are attached to this main board.??