GOOD MORNING...MY SON IN LAW GAVE US A SL720, THAT WAS NOT WORKING PROPERLY....I WORKED ON IT SOME, AND IT WORKS FINE AS FAR AS THE PEDDELS GO, H OWEVER, NONE OF THE ITEMS ON THE SCREEN WORK....DON'T KNOW HOW TO FIX THE PROBLELM, AND IF YOU COULD HELP, I WOULD APPRECIATE IT....PHONE 870-739-4880 OR E-MAIL......carlteenie@sbcglobal.net....thank you...cdb