Black Screen at Classic Startup?

Hello,
I have an OS9 drive and a OSX/Tiger drive. When I use the 'Startup Disk' Control Panel on my 9.2.2 drive, I hear the chime, but the screen remains totally black. Restarting a few times gets things going, but I would like to fix this issue.
Any ideas would be appreciated. Thanks!
J.C. Westin

Now that I've looked around a bit, and also read another reply to my question by 'K Shaffer,' I think the root issue is some kind of incompatibility between the upgrades, OSX, and OS9.
It's strange - and I've never seen anyone address this - but even though I'm running OS9 and OSX on separate drives, OSX has placed a large number of invisible files on the '9 drive,' and has Spotlight-indexed it, as well. I could see this happening if the G4 was running in 'Classic' - which it's not - or maybe even if OS9 was running on it's own partition on the SAME drive as OSX........but OSX's heavy-handed control over ANOTHER drive is unexpected.
The first time you run Classic (from OSX) it makes some changes to the OS 9 system to make it more compatible with OSX. These changes do not interfere with OS 9 when it is booted diectly. Unless told not to, Spotlight will index the OS 9 disk, The index will be ignored when booted into OS 9.
Having two separate drives, with two different - I could say competing operating systems - all coupled with a third-party processor upgrade, is probably not something Apple considered worth designing for.
Some processor upgrades need different firmware installed for OS 9 and OSX. Do you have the installation instructions for the upgrade?

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