So in trying to figure out what's going on in my boat with the new TZT22X installed, my VHF and speedo don't work. The VHF shows "no position" whereas when the previous TZT2 12's were there it did. Further the speedo is dead and is set to GPS. So it seems to me that the new unit isn't sending nema 2000 info to them. Is there a setting? Should I check PGN sensors to see if they are grayed out? Which ones?