If Prospero complains that the data disks are not synched, follow the instructions printed in the command window. If all else fails, try to synch the disks by restarting the WC and IC as described above. You must cycle the power after filling up a sunos disk. These are the xpupil, ypupil, camfocus, and grating tilt. The Prospero command ie 'reset' will accomplish the reset for all motors.
Individual motors can be reset, e.g., ie 'reset grattilt' .
If you are sure the IE is up and running and connected properly to the HE, but you can still not communicate with it, then there could be a fiber transmission problem. Have the electronicos perform a transmission test of the fibers or verify that one was done on setup. The fiber signal may be too weak even if light can be seen in the fiber. Corrupted images can also be caused by bad fiber connections, or dirty fiber connections.