New Westinghouse LED tv not picking up cable channels...no cable box being used

.YES IF ITS A DIGITAL TV U WILL GO TO MENU GO TO ANTENNA CHANGE FROM DIGITAL TO ANALOG OR AUTO ENTER THEN SEARCH ANOTHER WAY GET AN ANALOG TO DIGITAL SET TOP BOX FIX YA ANTENNA TO IT CONNECT TO TV BY HDMI.OR AV CABLES GET THE SET TOP. ON GO TO SCAN OR SEARCH AND YOU WILL HAVE ANALOG CHANNELS ON YOUR LED TV

Go to the menu look for the input settings make sure it is set for cable not air. There might be a input button on the side of tv or on remote that will let you select which input to use. It will have to be set on cable thin scan for channels.

Where is your antenna hooked up? Thru a cable box? Direct to tv? Completely describe setup, maybe post photos

If your TV is connected to a "cable" box, e.g. you're using cable TV ... then it is the cable TV box that determines what you can get (based on your cable subscription). Yes, I know that some cable TV and satellite TV service providers will only deliver HD digital channels when you pay an additional (monthly) fee for HD digital channels.
If you plug the cable directly into your TV (i.e. not use the cable box), you may be able to do a channel scan on your TV, to pick up the digital channels ... but you will loose the convenience of using the features that your cable box provides .

Several issues here so to begin with remove power from the set and a box of any kind if used for several minutes and then power back to see if a reboot helps or not.

how to search my tv channels westinghouse

If your TV has an On-screen Menu you should be able to access your Tuner controls. Run your auto channel scan and you should pick up your "regular channels". You may be able to de-select the odd channels and show only the ones you want to use.

U able to go into the tv Menu?Yes,goto SETUP changes Pick CABLE and scan for channels for the Comcast CABLE channels.Or Try website like Remotes.com to buy an original tv remote.

To get HD channel form your cable TV without using the cable provider HD tuner box but using your TV Clear QAM tuner (your TV has Clear QAM tuner, my TV also has QAM tuner so I do not have to use the cabel box, but my COMCAST does not provide may Clear QAM signals like they use to) to get the unscrambled HD, the cable provider must provide those unscrambled Clear QAMsignals for your TV to pick up the signalS.
Learn more about Clear QAM cable signals:
http://en.wikipedia.org/wiki/QAM_(television)
Did you use the correct setup during the tuner setup to scan the availabel cable channel per user manual?

The atsc or qam tuner in your Westinghouse LTV-32W3 HDTV is malfunctioning and needs to be replaced. Unfortunately you will need to purchase a new mainboard since it is integrated. Another option is to return to using an external tuner like your cable box.