There should be pads on the back for testing the voltage with a multimeter. Something like Vcore and GND.
Hi
The problem is, i don't find clear informations to setup voltage screw!, it's very nebulous... I tryed a freq of 500 MHz but i get lot of errors? Maybe the screw is not setuped correctly (i got the initial screw setup)
Regards
I found that messing with the voltage screw really didn't help. I deleted all my instances of combiner and reinstalled it from scratch using the instructions in this thread
https://bitcointalk.org/index.php?topic=5053833.0, and it worked great. You have to have a good USB hub and cooling, but it helped me get the newpacs running great.