I was trying to check for voltage on the c-port pins with the charger and battery connected with switch turn off. I honestly didn’t think nothing would happen and I don’t know why it was a good idea as I saw it in another discussion, but then I heard something pop when measuring with the black probe on ground and red probe on a c-port pin. All ribbon cables and connectors including the fan ribbon cables were disconnected, except the battery, charger and the one circled in red were connected.
please I don’t know if the battery popped or something else because the chips including the PI3USB don’t look burned. I tried turning it on and it won’t turn now after I assembled it.
I don’t know If I need to replace the battery or what happened.
will gladly hear any suggestions.