I just bought a 55 inch 4K ultra hd smart roku tv today from a lady. She didn’t give us the remote, and we called Best Buy, and Walmart to see what we could do. They said our best bet was to find someone with the same tv and borrow their remote to turn on our tv, but it didn’t work. The power light is on but my tv screen is black. I have unplugged power cord multiple times but that doesn’t seem to help. SOMEBODY PLEASE HELP ME!!! Really don’t want to throw it out.