6) Here is the display if everything works fine
If FPS auto was selected, Auto will appear in red the time required to calculated the effective rate, so up to 1 second. Then it displays the actual rate, e.g. 30.
As long as the white dot at the bottom keeps running, it means the signal is 100% healthy.
If the signal is way too weak or there is a problem with the setup:
If the signal is strong but not consistent, there could be yellow
(1 or 2 invalid frames in a row) or red dots
(more than 2 invalid frames in a row)