Hello everyone.

I have a Teensy 4.0 that I have been using for a hobby project. All worked fine until yesterday when I wanted to power the board with the usb cable and nothing happened.

After some digging, I found out thet the 3.3V rail of the Teensy board is shorted to ground. (0 Ohm tesistance) And the board pulls 400 mA from the usb.

I want to ask if you know of some components that would fail and make the short? Did you notice during testing that some capacitors failed sooner than other parts? (For example) I would like it not to be the chip.
Or do you know a way to find out what part failed?

I would like to repair the board just for the fun of it. I have 2 more boards on the way from the shop.

Thank you very much for your input.