Help! My Nakamichi LX-5 won’t play, rewind, ff, or record.

Every time I press play, it starts up, then automatically stops. The counter doesn’t move at all, either. Any idea what this could be?
atmasphere Yes, I think i'll take it to a cassette deck tech. I opened it up once, and it was very cluttered and I didn't touch anything, because I was afraid I would mess it up more.