Precip not operating
7777--
PNO means the Precipitation Detector is not operating.
Others:
PWINO: wind
FZRANO: freezing rain
TSNO: thunderstorm
RVRNO: RVR
VISNO: visibility
The $ means the ASOS needs maintenance.
I have no idea about 8/570 and 9/240 but those numbers are definitely a different group than the temp/dew point breakdown referred to in the previous post.
I'm sure you'll get another response soon. Good luck.