I was experimenting with a PAM8403 and an 8-ohm speaker when my laptop stopped recognizing my Nano. After inspecting the board I suspect this got component got burned (bottom board):
About this component: - It's entirely black with 3 vertical lines 'engraved' on the left - The surface of this component got a little teared up making the marking partially unreadable, with the ending "2" still visible.
Before the nano stopped working: - Nano kept self resetting while plugged into laptop's usb, perhaps this is a sign it was pulling too much current?
This is the current situation: - PC doesn't recognize Nano (no plug-in sound by windows, can't select Port in Arduino IDE) - When plugged in to power with usb, 5V-GND reads only 2,6V - When using batteries to power the nano (VIN), steady 5V from 5V pin, so voltage regulator is OK. - Using an USBasp I can successfully upload sketch Blink
Considering all of above I suspect the burnt component belongs to the USB part of the nano. After reading this site I'm thinking it's a diode but there seems to be no diodes at the USB according to the nano v3 schematic.
Does anyone know what component this is? I'm hoping to replace the part myself. Thank you for your time.