I have a WD-60638 that is hanging up at the Mitsubishi Welcom Scrren. It will stay there with the green led blinking for as long as we let it. (For those who are wondering the longest lenght of time was 2 hours). We have to turn it on , then after it gets to the Welcome scrren, hold the power button down to do a "reset", then turn it on again and it usually works fine. I have flashed the firmware with the latest from Mitsubishi site and have tried a few other reset options I have found in the forums and else where, but nothing seems to fix it. Any help would be appreciated. Thanks.