Just picked up my first DMD game.....Lethal Weapon 3. While looking at the pin the dmd would not boot(just a big clump of dots) and there was a loud buzz. We switched out the power supply board and it then booted and played correctly. Obviously the guy didn't want to sell his board out of his other game. Today I intend on checking all solder connections and ensure that all chips are seated properly (read that in another post). Is there any thing else in particular I should take a look at? I searched and noticed I can buy a new board for roughly $100. Is this old board fixable or should I just swing for a new one? Thanks for any advice.