Sounds like the clutch that shifts it from scan to play is gummed up, very common with Seeburgs. I believe on that model you can stop the mechanism on the far left, facing the front of the jukebox, cut the power off, and remove that gray plastic module and its mounting bracket on the left side of the record rack to see the clutch. What you want to lubricate is the vertical shaft where it goes through that inch long piece with the spiral grooves in it. Just a couple of drops on top of that spiral gear and let it sit for a while. Hard to get at, simplest way is to put a little oil on the shaft of a screwdriver or piece of wire and dab it on. You might be able to do this without removing the bracket that holds the gray box. Use lightweight motor oil if you can, not 3 in 1 oil nor WD 40, and definitely not penetrating oil meant to loosen rusted bolts. Plug that selection module back in and give it a try. If no joy, let it sit overnight and try again. Keep us posted, and welcome to the jukebox world.