Hav combo unit even tho I hav DISH-they said ther equip NOT mess w/ mine. It was OK, but BIG paper 4 clas my PC can’t acces- had 2 buy old film Ebay + overnite Unit ON won’t reject/open Menu wn’t open can’t chg clok either Icons display, shows chanl # but zero else. I unplugd, cheked wires, remote turns off/on but hav NOT used in so long I did I forget sequence? Need 2 push input on remote? When? How? Or other button? Help Desperate 30% of grade & been in colge 45 yrs Need 2 graduate