Power Computing PowerTower Pro User Manual page 68

Chapter 4, Troubleshooting
1.
REMOVE all peripherals from the back of the computer except the mouse,
monitor, and keyboard.
Examples of peripheral devices include removable drives, network connections,
scanners, and modems. It always easiest to test for conßicts caused by external devices
Þrst. If, after removing your peripherals, your issue goes away, add back your
peripherals one-at-a-time, restarting each time to verify whether or not the newly added
peripheral is the source of your issue.
2.
Use the Extensions Manager to test the computer with System 7.5.x
extensions only.
The Extensions Manager is located in the Control Panels folder and can be accessed via
the Apple menu. You can also access the Extensions Manager during startup by holding
down the Space bar as the computer boots. You can use the Extensions Manager to test
the computer with only the Apple system software, excluding all non-Apple extensions
and control panels which may be causing conßicts. You can do this by selecting
ÒSystem 7.5.xÓ from the Sets pull-down menu. Once you select ÒSystem 7.5.xÓ you will
notice that the check marks next to several items in the Extensions ManagerÕs
extensions list disappear. A check mark next to an item indicates that the item is active.
The items without checks marks are non-Apple system software and were disabled
when you selected ÒSystem 7.5.xÓ.
3.
If after setting the computer to ÒSystem 7.5.xÓ the issue does not occur, it
is most likely related to a conßicting or corrupted extension. Turn the
disabled extensions on one-by-one, restarting the computer each time,
and verifying that the extension you just added back is not the source of
your issue.
If your issue returns after adding back an extension, disable that extension. Remove the
suspect extension and try re-installing it to see if the copy on you hard drive is
corrupted. If replacing the suspect extension with a fresh copy fails, contact the
manufacturer of the extension to report your issue. They may have a newer version
which resolves your issue.
4.
TEST the issue when booted from the Power CD.
If the issue does not occur when booted from the CD your issue may be a corrupted
System Folder. If it continues to occur, the application you are trying to use may be
corrupted.
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PowerTower Pro UserÕs Guide
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