I am experiencing a similar no signal frame from my 16200 as Dr. Whitby had with his system years ago. @Bill had only recently logged in and changed settings so that the filter wheel guider could work, and that did the trick in getting guide stars. The camera appeared to work well then, but shortly after, all of a sudden we get no signal on the main chip while the guider continues to show a wealth of available stars. Our drivers and firmware are up to date and rebooting/restarting had no effect. Same lack of image in MaximDL and SkyX. I did send a note to Bill late Saturday night, but thought I should also post this to the Forum as well. Maybe someone out there has had a similar issue and a resolution with the STXL 16200 camera that I can implement instead of shipping to Bill. -Al