How do I switch my SDTV analog Sylvania 27 inch television (CR270SL8) back to digital? I don't have the original remote because it broke. I did have it when we had to switch over to digital. I have a universal remote which is an RCA (RCRN03BR). My son was playing with the menu button on the t.v. and now we can't get back to digital with the remote we are using. Any chance I could get a replacement remote?