Although it checked out ok when I first reinstalled it, the ant2 u.fl center conductor was not making the trip to the sma connector. I put some flux on it and reheated it and was able to get some M ohms at first but then nothing. I printed the sim7600 hardware design manual page that shows the layout of the pins. Interestingly, the top pins seem to be reversed (?!?!), for example gnss_ant buzzes out as the third pin from the top right instead of third pin from the top left as shown in the pdf. But aux_ant buzzes ok. But I see my problem: R6 and R7 are not populated. Looking around ant3, I see R8 and R9 are 0 ohm jumpers, so I think I need to move them. (C8 and C9 are also empty but so are C10 or C11 so guessing nothing to do there.) Craig