Hello folks, My powermac g4 started acting up last night. I tried to install OS 9 for classic using the Netboot dmg guide found here: https://groups.google.com/forum/#!topic/macos9/nR2QQCKaCFA This worked great and I read that my machine could also boot natively into OS9 (since it shipped with 9.1, 9.2.2 should always work). Then I happily changed my startup disk using System Preferences and rebooted. About then the mess begun Upon reboot, the machine showed a greyscale screen with a floppy with a blinking question mark inside it (like those 80s / 90s macs show when no floppy disk is inserted). I tried to boot using the Option key but since the OSes are installed on the same partition this was of no use - It listed my HDD and that was it. Then i thought: "Let's burn a OS 9.2.2 CD on my CD-RW to re-set the boot drive". The burning succeeded but the disk appeared un-bootable. What did I do wrong? I was too hurried. On the next attempt I left the machine alone for 15 minutes. Then OS 9 had booted. I opened the Startup Disk panel - but the hard drive was not detected. I then searched the Internet and realized what was going wrong: The hard disk has no OS9 drivers installed. Since I bought the machine with Tiger on it - and never reinstalled it since then - I didn't knew this and am not willing to reformat it. Third attempt: Burn the first install disk from the 4 CD-version of Tiger to my CD-RW (Sorry, this cd / dvd drive does not support burned DVDs, only original aka pressed ones). Then tried to boot it but it froze and auto-booted into something called "Open Firmware" - Yes it did that on its own. I then searched at Apple and found out I needed to reset NVRAM and PRAM by typing commands in this Open Firmware screen. The machine restarted and now showed the Finder folder blinking - More in OS9 style and -thank god- in color. Then I inserted the CD with 10.4, waited and waited and: it booted! I chose Apple System Profiler and there it said it: Mac OS 9 drivers installed: NO Knowing for 100% sure what the issue was, i clicked on Startup Disk and selected my 10.4.11 installation. I crossed my fingers, rebooted and my machine was back to life again I'll be looking for a new PRAM battery in the near future since i also found out that my machine consumes nearly 10 watts of power when completely shut down. I fear that leaving the power cord unplugged for too long will cause my system to lose date / time and its boot configuration.. Final note: During all these boots, the system did not always play its startup sound. Can Startupsound.prefpane cause this misbehaviour?