Changes
* Check that you've got the light path right: guide mirror centred and the rear-of-slit mirror in the beam
* Then check that it's not an image scaling issue, by turning on the slit illumination (which is bright enough to show up under most circumstances)
* If you still don't see anything, go to :-exiting the back of the SpUpNIC PC (top right corner of the shelf above the monitors)ROS GUI* Unplug -press the USB cable marked "spupnic lodestarpower cycle ROS camera" and plug it back in again* Start button from the exposures again and use the slit illumination to check that the camera is aliveTCS GUI* Alternatively, one can unplug and re-insert the black USB cable that goes into the actual camera (which projects through the south cover of the instrument) instead of on wait 30s-restart the PC endROS GUI.
==Technical Notes==
