MSD mess

my brother in law had a digital six msd box and we were getting no spark. Found the pick up in the billett msd distributor to be junk. replaced, pick up working, still no spark. no power to the coil! Had a bad digital six box.
First check for voltage to the coil. Then possible distributor problem, next msd box. Look on msd website, they have trouble shooting routes you can take to see if box is bad! Could be as simple as a power up(lack of) to the box or lack of a good ground!