VAX DSSI dyssentary?

I have a 'new' microVAX 4000-200 here that has a few small oddities with it, and I could use some advice. Number one is that it will not boot. I tried 'b dia0' and 'b/r5:e0000001 dia0' and both times it's nothing until timeout. Number two is that 'show dssi' and 'sho dev' show no disks, nor the TF85. After some initial confusion where one or more disks were tried uncabled before powerup, the DSSI terminator was discovered missing, so I used one from another machine. My questions are, are there other tests for a disk besides booting it, and, what could be wrong with the DSSI bus? I tried other DSSI ID's on the disks but no real change. Do the ID's have to start with 0? A tidbit with the terminator off was that the countdown tests went from 95.. to 60.. and then autobooted immediately back to 95 without continuing down. I could have sworn at the time that 'sho dssi' worked then. Probably unreleted but FYI. TIA John A.