This is where a Pascal board manual or making contact with Pascal himself might help if you are not quite sure which coil and what you should be checking.  I am guessing that the manual would list which coils are numbered what with his board to pinpoint the culprit.

Other option is to check all the coils under the playfield - give a little tug on all the wires and make sure none are loose.  If they are all good, check any diodes and make sure none have come loose as well as the winding itself.  Also check that the plungers on all of the coils move in and out of the coils freely.