Tilt can come from 3 possible switches in parallel with each other. In the cabinet there is the Plum bob and roll cage. There is an aditional tilt switch on the playfield. The switch on the door is slam not titlt.
Put the game in switch test take turns unplugging J2 and J3 from the mpu and see if either one clears the stuck switch. That will narrow down where the problem is.

This is really simple. Put the game in stuck switch test and unplug J2 and J3 from the MPU. If it still sows 07 stuck it's an MPU problem if not plug on J2 (playfield) and then J3 (cabinet). That will tell you if the short is on the playfield or in the cabinet.