This question is an exact duplicate of:
- Wrongly junctioned GPIO 1 and GPIO 2 1 answer
I guess everything is in the title. I wasn't trying to connect any pins. It sounds stupid but I was holding my keys and was just trying to put the usb power supply on the Pi and accidentally connected 3.3v and 5v or both 5v (don't really know). Now only the red LED is on. Is my Pi dead?