Was lese ich da in den Softwareupdates http://docs.info.apple.com/article.html?artnum=302212-de Power Mac G5 (Late 2004) 1.8GHz models stop responding randomly Some 1.8 GHz models of Power Mac G5 (Late 2004) computers may experience any of the following symptoms: The computer may freeze when performing certain video-intensive tasks for extended periods of time, such as a full screen slideshows, QuickTime playback, or some games. The optical drive may not eject when you've been using the computer for about two hours. Internet Connect may become unresponsive when you've been using the computer for about two hours. (This issue can affect either internal or external modems that use PPP as well as DSL modems that connect using the PPPoE protocol.) Attached displays may not wake up properly after the computer, running Mac OS X 10.4, has been sleeping for an extended period of time. The computer seems to wake up, but the display doesn't. A firmware update is available to address the symptoms described in this article. The Power Mac G5 System Firmware Update is only for the 1.8 GHz, 600MHz bus single-processor Power Mac G5 (Late 2004) computer and requires Mac OS X 10.3.9 or Mac OS X 10.4.3 or later. Additional information about the firmware update and requirements are included with the download.