Quoted from Jean-Luc-Picard:
Top Switch and Left Switch is on. And the rest are off. Also, the T-rex doesnt adjust when you turn on the machine.
When I pull the trigger the jaw test works. but up/down and left/right just make a buz sound like the motor cant move. I use the left and right flipper buttons for that test and nothing.
Depending on how you bought it from your sell, I would...
Email the seller and just say, "hey, I got this home and the T-Rex isn't working. Any tips on what might have gone wrong?"
For me, I always feel like if it is working or I don't check it before I leave, it's on me. I will contact people like that sometimes because a lot of games have "personalities" and the same stuff goes bad, so they might have insight. Once in a while, a seller will offer to come help fix it or whatever - I had one seller who I bought a game from come to my house and repair it with me for like three hours for something small, and I told him multiple times not to, but he said that he wanted to make it right.
Regardless, I'd start there, and if that doesn't do anything come back here and ask. I can't run mine through diagnostics right now. The baby is asleep and wakes up for practically everything, so testing JP is out