RA-81 issues

[Jerry Wright]

Did not see this come through so here it s again.

I have a rack full of  RA81's, all Pass Rom base self test.  If  I try to spin 

up one of the drives, It will start to spin up and then just stop.  There are 

no front panel lights that come on or codes on the terminal screen.  all 3 

drives do the same.

These are not connected to a controller, and  the manual does not say this
is need. 

The forth one has no drive and the motor seems to turn hard,  is there a brake
on the motor ???

- what I'm I missing here
Thanks Jerry