My sony prs t1 restarted after less than 5 mins of use. Or even sometimes frozen. I am at 1.04 stock, so i doubt this is firmware issue. I live outside US, so left with no warranty from Sony.
Try to reflash using your image. As I write this, it has been an hour where the led is blinking and no sign of completed process. Should i wait until the battery depleted? Thanks.