AND, you may need to reseat that board several times!! Very finicky!! Use your thumbs pushing down on the white pull tabs, rocking just a little, left and right.
Always worked for me.
I'm sure it's here at NLG somewhere, Ultra boards were Universal's worst nightmare. The pin connections in the backplane just too large, pins barely make contact. Little dirt/dust and they act up. Move the machine and they act up. Over time ground pins corrode a bit.
Every freaking error can come up, coin comparitor fails to power up, hopper jam, you name it. Sometimes a different error every power up!!!!
THE KEY, clean pins and backplane and a solid connection. Then don't move it. LOL
Now that these machines are getting old, power supplies and mpu's will die. Usually caps first.
Start with pins first and then the rest.