Your TV probably does not have a digital tuner connected to the DTV/ANT input. Mine didn't. I had to connect the digital antenna to a digital converter box THEN go to the DTV/ANT input. Only then would it activate the DTV menu and allow me to scan for channels. If your TV worked fine with Cable TV connected to the input, it was because your signal was coming from the digital tuner in your DVR, or your cable provider was sending you an unscrambled digital signal (not likely).
I used a digital converter box I had purchased with the government $40 coupon back in 2009 but the resolution is only 480 and looks like a Monet or Renoir. Now I am shopping for a high quality tuner.
We'll try to use the Antenna you have to make this work. For the Vizio L32 TV, move the antenna cord to the "Digital ANT./ Cable" port.
Then, change your input to DTV.
Then,
Press the DIGITAL HD button on the remote until “DTV”
appears on the top right of the screen. When the MENU
button is pressed, the On-Screen Display (OSD) appears on
the PICTURE ADJUST page. Press the RIGHT arrow
button to highlight the TV selection.
This will display the DTV TUNER SETUP OSD.
Scan – Automatically scans for all of the digital TV channels
available and stores the information in memory.
Press the DOWN arrow button to highlight AUTO SCAN.
Press the OK button to activate. NOTE: This will take several
minutes to complete.
Once Auto Scan has finished, press the Exit button to return
to the previous menu. The channels should be coming in.
You may have to move the Antenna to get better reception.
I hope this help you out.
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