I have a 2011 Japanese Prius.I encountered this problem last night when my car wasn't not responding to the remote, so i opened the car with the key to get in. as i tried to start the car by holding the brake and pressing the start button, there was no indication on the start button or the screen, i tried the same for 30 seconds and after a few attempts it started. after the startup all the settings were reset including the stereo, climate control and the trip meters including their past histories. Can anybody help me in identifying what the issue might have been? Thanks