First time builder here (especially with anything of this complexity). I just finished getting everything all wired up, only to find that my pi wasn't receiving power from the Powerboost 500c (which is also monitoring the battery). I tried to follow all of the traces and everything is fine right up until it makes contact with the PCB, at which point the voltage drops (was about 3.3v, this evening read basically zero). My going theory right now involves my solder job to the PCB, but since I'm using an older board I figured I'd see if anyone else has any ideas, since I haven't seen this version of the button pcb before. Any advice helps. Thanks!
Close up of the area in question:
Board front with version number:
The whole setup: