A-B C-D < ---+----------+---------+ < 1 | M7606 =============| < 2 | M7608 =============| < 3 | M3106 === | < 4 | M7516YM== | < ---+----------+---------+ < 5 | M7546====|M7555====| < 6 | < 7 | < 8 | < 9 | < 10 | < 11 | < 12 | < ---+----------+---------+ < 13 | | HDCNCTRS < Slot 13 bottom is not the HD controller, it's the distribution card. There should be a 50pin cable bettween the m9058 and the m7555(rqdx3) card. Pull the m3106 and bump the rest up one with the last one being the m7555. It shouldn't make a difference but at this point you don't need it to boot. This will give you a minimal config for the bus. Also make sure the overt the top cable for the memory is good! A-B C-D ---+----------+---------+ 1 | M7606 =============| 2 | M7608 =============| 3 | M7546 === | 4 | M7555 === | ---+----------+---------+ 5 |===Q->====|==Q->====| 6 |====<-Q===|===<-Q===| 7 |===Q->====|===Q->===| The arrows are added to indicate the qbus grant flow for the bus starting at row 5. Allison