Happened to me yesterday. Port would open for 1 second, then immediately closed. Did it about 10 times. Was out in the country so had to charge. Held it open and plugged in charger...with port door resting on charger. Go home and tested again..everything worked fine. I thought maybe being out of cell phone range might have something to do with it..but will take in for service if it reoccurs. Just had charging port assembly replaced 1 month ago so was surprised this happened.