Hello, Lars... What have you done to restart the Quicksilver? You may have tried this, but I would suggest unplugging your machine and letting it sit for at least 10 minutes. Be careful not to jostle the machine. Plug it back in and try the normal start up by pushing in the start button. If that doesn't work, try holding in the start button in for a full minute or until it starts. This has worked for me in the past. Kathi Subject: [G4] Was Sonnet G4 upgrade now Quicksilver breakdown Thanks a lot for two positiv answers. I hadn´t realized that the update was to be found in the firmware. I think that there is no need for an update. Especially not in this very moment because my Q cannot boot at all now. There was a short break in the electric net (which very seldom happens here in Sweden) just when the Q was sleeping and now it cannot be rebooted. Where is the prince with a warming kiss? Any idea?