I upgraded HD-DVD A20 to firmware 4.0 couple of weeks ago. Everything was fine till today when in the middle of KingKong I got disk read error message. I took the disk out for inspection and found it to be free of smudges and scrathes. I cleaned it anyway and put it back in the player. It went on and on with loading with none of the other function keys working. I finally gave up and power down the unit by taking the power cord out of the outlet hoping to reset the player. When I plugged the unit back all the functions were back. Now I can play only SD DVDs on the player. Any attempt to play a HDDVD locks the unit in loading and the only way to regain the control is by killing the power. Any one has experience with this issue. What can I do to watch HD-DVDs. I have a large collection and dont want to let go of this unit.