zig modded another Gridseed today to see if the clicking sound is a problem of the first one but the secondone show the same clickung sound. i checked the solder connections no bridge and the ground / R128 test shows the values it should i dont tested the c42 DDV because i dont know which it is any idea ore somone has the same problem / solution fr it ?
i had a clicking sound when smd wasnt properly soldered, maybe you have scratched smd line on pcb or something.
check resistance value between that test point in lower position, and directly on chip to ensure that that line is operational.
cheers