I have kind of same problem as in the earlier posts. My DCM580 finds the update file from USB and starts to upgrade. But after upgrade when "DONE"- message appears to the display, my player goes "nuts". The "DONE" message stays on the display whatever I do... It's on the display even on the standby mode. Only way to get rid of this is to plug-out AC cord and put it back. After unplugging I can check the update from my player, and it says V45. BUT still... iPhone 3GS with latest iOS 5 dont work with the player.
Please help me.
Is there any other way to restart the system after upgrade than plugging off the cord?