VR100-AA + VCB01 Problem...

[tester]

 I'm running Ultrix 3.1B on a MicroVAX III which is equipped with a QVSS
video subsystem composed of VCB01 card and VR100-AA monitor (plus
keyboard and mouse).  It seems that when the monitor is used it tends to
shift all text four columns to the left (first four characters jumbled)
and a half row up.  I've checked for corresponding empty space on the
right side and bottom.  I've been all around this VR100-AA monitor and
can't seem to find any kind of adjustable dial(s) that controls the
horizontal and vertical hold.  Can anyone suggest a means of correcting
this irritating behaviour (short of sending it to repair! :-)

 Thanks!

    Lee
thx1138 at nyu.edu