Ziehm exposcop 7000 error E65

That error 65 means there is no video signal arriving at the Module 3. The following are possible causes....
Cable interrupted
Check video cable from CCD camera to Module 3
Check video connectors of camera and Module 3
I.I. power supply is set to 6 V camera supply voltage, camera requires 12V
Set camera voltage to correct value (J1 on U316)
see Module4 → Ch. , p. 7-8
Camera has no supply power
Check camera supply voltage
If 18 V input voltage of the i.i. power supply is present and no camera voltage
is present, replace i.i. power supply
CCD camera defective
Replace CCD camera
Module 3 input stage / genlock defective
Replace Module 3