I’d post a picture here and then you’d get some feedback on whether the unit has been hacked up or not. Anything is possible, but I’d hate to see you buy a bunch of parts and do a bunch of work and still be stuck.
Regarding the startup sequence, I’d search pinside for the game and look at all the tagged threads to see if there’s one on walking through the startup to get some info. There’s almost always one that someone has had to go through before you . I continue to be amazed and pleased by all the archived info here that has helped me tremendously. It saves me from having to post new threads about my troubles.
Good luck,
Dave