Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
undefined
@polbebe do any other components get hot apart from U4? It's possible that some other component powered from the 3.3V internal rail has failed and is overloading the regulator. Check the main microcontroller in particular.
