The three LED meters in the upper right of the s7000, the ones that can be PAFL or main out meters - they are active when i PAFL a mix or input but when I tap the clear button they don’t work any more. I can see (and hear from the PA) the mains are getting signal on the channel strip but nada on the three in the upper left. Did I inadvertently turn them off somehow??
Lower right has “Mains to PAFL”, which controls what you listen to when no input/mix is selected for PAFL. It also happens to be what is metered. You have the ability to “route” L/R Mains to L/R/M PAFL so you can skew the meters as you wish.
(this involved a few minutes of panic one day learning this - nothing was coming out of the board … but it was, just no meters)