I got two Pi's, and both of them have the same problem. To the first one, I connected a 3.3V power supply to pin 1, following which the board didn't boot and no LEDs lit. The board seems to be dead, and the IC labelled U3 in the schematics heats up. The second one worked fine for few days. Yesterday, I plugged in a USB power supply and connected a ethernet cable directly from my Mac to the pi. The pi went dead. Again, U3 gets extremely hot.
I have already read the elinux troubleshooting guide and that didn't solve my problem.
Pin 1 on both Pis gives 0V. I tried removing the U3 and provided 3.3V from a regulated power supply on pin 1. But, as soon as I connect it, the supply shows 0V and ~1.5A current.
- What might be the reasons that caused the Pi's to die?
- Is there a way to fix them?