I somehow got 2 intensity channels always showing FL in Yellow. I have no idea how it happened and I could not get rid of them either. Reloading the show did not clear them and neither did loading a different show. It also persisted over a poweroff/poweron cycle. I tried a deep clear and got a message that it could not be done and to reboot and try again. After I rebooted I went immediately to Maintenance and the deep clear worked. This got rid of the problem. My question is, what does the Yellow color mean? It is not described in the book. Secondly, why does deep clear not always work?
I should add that there were no other indications in the live display for those channels.