How can I watch the substations on tv like 25.3 or 19.2 on my televsion and not with my PC?

You need a OTA antenna connected to the TVs digital tuner to get the available sub channels. 

An OTA????  What is that?  A regular antennae? It's already hooked up, but not in use, apparently.

(maybe it is hooked up wrong, thats always a possibility)

If your over-the-air (OTA) antenna is hooked up to your TV, then perhaps it's not able to pick up those stations. Check out www.antennaweb.org , enter your location, and see what stations are available at your location. 

At any rate, as mentioned, DirecTV doesn't deliver those main station's sub-channels. 

Correct OTA = Over The Air antenna. You have to change the TVs input to whatever input your TV calls it to get the OTA sub channels maybe ANT.

Hello @Jadevine We want to help clear things up. 

Let's meet in a Direct Message on this. Please check your Direct Message Inbox (It's the chat icon next to the bell icon in the upper right corner of the Forums).

We'll be waiting for your message.

David, DIRECTV Community Specialist

Direct help:  There is no such icon.  There is only the bell, a letter and empty space.  To the left, there is direct.tv, which is not the right place.  Unless it is further down on the page, but there is not such icon there either.

Shannon02,  I looked at the tv, gonna have to find out what is what back there because it is all in some mysterious code.  So, it's off to find the website to figure out what color of wire goes where. Crossing my fingers, here!

There's no reason to take this thread into private messaging with DIRECTVhelp. Just provide the information I asked previously. We can help you here. 

No worries @Jadevine. It's the envelope icon.

We have sent you a message, so you can get a notification to connect with us.

David, DIRECTV Community Specialist

Most OTA antennas use coax cable to connect to the coax input on the TV.

DirecTV does not supply sub-channels (such as 2.4 or 2-4) for most areas. Check www.directv.com/locals to see what is available for your zip code and county.

For any channels DirecTV does not provide, you use a regular over the air (OTA) antenna. You connect it to your TV normally by the coax (often labeled ANT) and tune your TV to ANT just like you would for HMDI-1, HDMI-2, etc. Then you get whatever is in range of your antenna.

Antennas don't have colored wires, they have a coax cable (screw in) that gets connected to the ant/cable port on the tv.