I have a Dynex DX-LCD19-09

You can go to the Dynex customer support website at (http://www.dynexproducts.com/pc-694-23-dynex-19-720p-widescreen-flat-panel-lcd-hdtv.aspx)This is the support page for you model television. Just copy the address and paste it into the address bar of you web browser. The page has a pdf copy of the manual that you can copy. It also has access to the customer support technical service using the e-mail support. You can also call Dynex customer support at this telephone number 1-800-305-2204 between the hours of 7am - 12am CST. Give them the model number of your television and ask them for help with you set-up problems. I hope this information helps you with your problem.

Press menu, then there should be a tab that says channels. Select that and then auto search or auto setup.