I have a Pi Zero W that I’ve been running Retropie on, last night I unplugged a USB gamepad plugged into the pi with a usb extension cord, I felt a small electrical shock from the extension cord and the Pi shut off. I picked up the pi and felt another shock from the GPIO holes (the case has a hole in the bottom for the GPIO). Now the pi won’t power on at all. I ruled out an issue with the SD card (I put it into my Pi 2B+ and it worked) or the power cable (I tried the power cable from my other pi and had same results). I tried plugging the Pi Zero into my windows 10 laptop with a micro usb data cable to check for signs of life (following the directions here: https://learn.adafruit.com/raspberry-pi ... -zero-dead) and nothing happened other than the Pi Zero heating up a little.
Is there anything I can do about this, and if not, what can I do to prevent this from happening again if I get a replacement?