Not underneath the heatsink, below the heatsink Slightly closer to the USB connector than the edge of the heatsink. The reset testpad is the pad on the back labeled "reset".
A visual inspection doesn't show any clearly damaged areas, but I've included more pictures just in case.
https://imgur.com/a/tOHbYI measured the voltage using the reset testpad and these were my readings:
VCORE: 0.55 V
1V8: 1.80 V
0V9: 0.48 V
RESET: 1.61 V
im not sure but it looks like the pot is turned all the way down.. this isnt enough to run the compac..
id turn the pot clockwise until the flat part is pretty much on the bottom _ this is around .7v