Ordered replacement board on Wednesday, received Saturday morning.
Replacement of the Pur-Beta Control Board. Removed all of the 3/16 hex nuts, removed right hose cover panel, dropped whole assembly down.
Unplugged cables into board. Removed bulb. Removed light column (clear plastic piece on right above board). Pulled out control assembly (toughest part, since it has to be worked out slowly).
Replaced assembly, and performed reverse of disassembly. Powered up unit, worked like a charm! Saved money and didn't need to replace.