Cannot get local channels back after dropping cable.

Are you positive that your city has not done the Digital Conversion? Some Cities are doing it early before the February deadline. Also make sure you are tuning in to the correct channels. Meaning that if on your Cable Provider ABC was on Channel 3 that does not mean that ABC with still be on Channel 3 after you have your Cable turned off. Most of the Time the Local Stations Tag will let you know what channel its on. It will be something like "KWAS ABC 27" So on your TV you would Tune it to channel 27 to get ABC and the same fore NBC , FOX, CBS , etc...
I hope this helps Take Care =)

You probably just need to reset the tv back to antenna mode. In the TV menu you will find a channel section that will let you pick cable or air. Set to air and preform an auto-program or channel scan. Instructions vary per brand/model. Make sure your antenna is setup correctly and hooked to the appropriate input/rf jack. For analog put the rabbit ears up high, for digital keep 'em low.