I’m looking for some help here.
I’ve been given a switch to repair : the symptoms were that it won’t charge and won’t start.
I’ve checked the caps around the 2 usual chips (pi3usb, mt92xx) but couldn’t find anyone that was shorted.
I’ve also managed to charge the battery using my GSM phone charger (9V, usb-C) and the battery that read 0V before charging actually showed 3.7V after a 3 hours charging session. Still, the switch would not start.
I then checked all the big caps that are located under the cpu (i.e. on the opposite side of the cpu) and found several that were shorted. I haven’t unsoldered them to check further and went asking for some advice here and what should be done or done again in a different way to correctly diagnose the issue.