RE: TOTAL NEWB NEED PLEASE HELP PROFESSIONALS WANTED

mayermakes — Thu, 27 May 2021 17:20:01 GMT

You can take ground from wherever is it present, for example the GPIO header.

here is a list of the testpoints for the pi3B /B+

PP1 VCC +5V (from micro USB receptacle)

PP2 VCC +5V (from micro USB receptacle)

PP3 GND

PP4 GND

PP5 GND

PP6 GND

PP7 5V after polyfuse

PP8 3V3

PP9 1V8

PP10 Power LED

PP11

PP12

PP13 Status ACT LED

PP20 H5V (5V at HDMI connector)

PP21 RUN (reset signal)

PP22 Ethernet Activity LED

PP23 Ethernet Link

PP24 Composite Video

PP25 L Audio

PP26 R Audio

PP27 USB VCC

PP28

PP35 VCC +5V

PP36 USB D-

PP39

PP40

PP41 USB D+

PP42 USB D-

PP43 USB D+

PP44 USB D-

PP45 USB D+

PP46 USB D-

PP47 USB D+

PP48 GND

PP49 GND

PP50 GND

PP51 GND

PP52 Ethernet TX+ ?

PP53 Ethernet 3v3 ?

PP54 Ethernet RX+ ?

PP55 Ethernet TX- ?

PP56 Ethernet RX- ?

PP57 Ethernet 3v3 ?

PP58

PP59

PP60

this thread has some more information and its also where I got the list: https://raspberrypi.stackexchange.com/questions/91901/what-are-the-functions-of-the-test-pads-on-the-pi-3b-3b
With the broken connector there is a possibility that some traces may be shorted, so check them with a multimeter before repowering your Pi.