From Uniman:
The problem is the 95 error. 51 is door was open and 19 is a ram clear was performed, both these two go away when machine is played. The 95 causes the tilt. The mpu sees the dollar bill validator cash can as not in place. Try removing and reseating the cash can. There is a little microswitch in the back of the cash can rack. (also try reseating the mpu as this is the most common reason for all kinds of errors)
This Action indeed Fixed the issue!
Thank you Uniman!!
Christmas gatherings are always more fun when the gameroom is in good order