Apple PowerBook (2400c) - Manual (Page 90)

Other problems while working
The screen went blank.
m Screen dimming may be on. Move the pointer to restore the screen’s
brightness. You can adjust the interval before screen dimming takes effect,
or you can turn screen dimming off, using the PowerBook control panel.
m The computer may have gone to sleep, as indicated by the blinking sleep
LED in the latch. Press the Power key (or any key except Caps Lock or the
trackpad button) on the keyboard to wake it.
m The battery may be drained. Install a charged battery, or plug in the power
adapter and let the battery charge for a few minutes. Then try to wake or
start up the computer.
Some icons look different from usual.
m There may be a problem with the information that the computer uses to
keep track of files. Restart the computer and hold down the Command (x)
and Option keys until you see a message asking if you want to rebuild the
desktop. Release the keys and click OK.
Note: If you have Mac OS Easy Open installed, you must turn off all
extensions except the Mac OS Easy Open control panel, and then follow
the steps given above to rebuild your desktop.
m You may be using a file-compression program to save space on your hard
disk. Some compression programs change the appearance of icons.
When trying to open or move a font file, I see an error message.
m The font file may be damaged. To remove damaged font files, follow
these steps:
1. Drag the Fonts folder out of the System Folder.
2. Restart the computer.
3. Open the Fonts folder that you dragged out, and drag undamaged fonts
to the System Folder icon. Click OK in the dialog box.
4. Throw away the old Fonts folder.
5. Reinstall the damaged font from the original disk.
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