Last week I got my first 101 and plugged it into my usb port to do the blink code and within seconds, the power circuitry is overbearingly HOT!!
Upon further investigation and looking at the schematics I am not 100% sure but I think it is the U10 chip, found in the"Barrel Power Input" section, second page of https://www.arduino.cc/en/uploads/Main/Arduino101-REV4Schematic.pdf.
I think this is the IC that switches the power selection from barrel to usb.
Ive tried a 12V wall wart, 9 volt and usb power, as well as just a 3.7 lipo and a 5v supply plugged into the vcc, all make the board light up(but get hot!) and all current draw is under 500 mA, for everything. For an instance the board drew around 350mA from the 12 v wall wart(which seems a bit much, no?)
note: no peripherals, just that chip eating away current...
This chip gets so hot that I can not touch it, and I don't want to let the magic blue smoke out so do you have any suggestions?