P1900 proscan 19" Led flat, hd infinity/cable programs/ channel scan, not getting much but audio/music

Not enough info
Channels from the air cable/satellite/fios
Using the tv to change channels or other device.
Is the INPUT button on the correct input port

Yes. You should connect the TV with an external antenna, and should do an auto-scan, to search and store all the available channels. Refer its user manual for details.

Those are not channels they are inputs for other things like HD DVD players, cable boxes etc

Try Component for this if possible.

your toshiba player should have output composite video and audio which are color coded Yellow for video, red and white for audio same goes for proscan hdtv. connect between the two keeping in mind color of cables. If the toshiba player is really old you can connect the RF cable output to antenna input to the proscan tv and watch taped programs from the player on channel 3 of the proscan tv. If then you want to keep the hookup and still watch HDTV connect the antenna to the toshiba vcr and when you shut off the vcr you can now watch the hdtv channels as usual because now you are bypassing the antenna to the Proscan tv. Hope this Helps..

Try pressing the MTS button on your remote while on the channel that does not have audio and select stereo. Most likely this will be set to SAP (secondary audio programming) and there is no SAP programming on that show. This is not something that could be avoided. It was during the channel scan, it locked in the SAP audio broadcasts for some reason.

Make sure in the menu that you have the tuner set to Cable Mode, then auto program again. Hope this helps.

Go into your menu and make sure the tuner is on Cable, then auto-program....Let me know?

I need programming instructions for proscan universal remote control. I have code.

This might help you

Proscan 19LA25Q 19" LCD HDTV at Crutchfield.com Proscan 19LA25Q 19' LCD HDTV: Detailed Info, Features and Specs, and Photos. ... Instruction Manual; Product Registration Card; Limited Warranty Card ...
www.crutchfield.com/ISEO-rgbtcspd/App/Product/Item/Main.aspx?i=68319LA25Q - 46k