Not sure if anyone else in this thread recommended it but always check the end of the plug for debris or bits of plastic stuck on the pins. I once found a plastic sleeve on one the pins of a supercharger cable. I didn't have pliers to pull the plastic piece out so I switched stalls. I bet it would have been tough to remove if I had plugged it in.
Good call with checking+switching, but I wouldn't be putting pliers into a SC. What if you short something??