@uncledave11 , Dave, I did not find any one selling the replacement board. If you or a friend have some knowledge of using a DVOM and some familiarity with components on a board, capacitors, resistors and diodes you can test and some times visually see defect and replace parts. Below 1st link will get you inside the vacuum to the board I believe and the other 2 links are some tutorials on how to test and visual for failed components. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
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http://www.thomasnet.com/articles/automation-electronics/testing-pcb-components
https://www.lifewire.com/three-main-failure-modes-of-electronics-818903