I have been doing some prototyping on a Raspberry Pi 2 to make a gameboy with retropie. After soldering the 3.5 inch screen to 5v Pin 2 and GND Pin 6 I may have shorted the pins because I saw a spark fly between the wires. Now the Pi only works without the GPIO connected. As soon as the ribbon cable is connected to the Pi it turns off. I had not yet set the pins to any specifications.
Did I kill my GPIO? As it says here I probably did
If so, is it possible to salvage my Pi's GPIO?
Also, the pi's GPIO died when the power and ground wires were touched because of the soldering job ( I am not very good) This sparked and killed the GPIO.