Manual

Troubleshooting
8 - 2 Basic Hints and Tips
8
Basic Hints and Tips
Many of the following may seem obvious but they are often the solution to a problem when your computer ap-
pears not to be working.
• Power - Is the computer actually plugged into a working electrical outlet? If plugged into a power strip,
make sure it is actually working. Check the LED Power & Communication Indicators (see “System Map:
LCD Panel Open - Model C” on page 1 - 11) to see the computer’s power status.
• Connections - Check all the cables to make sure that there are no loose connections anywhere.
• Power Savings - Make sure that the system is not in Hibernate or Sleep mode by pressing the keys config-
ured in your Power Options (see “Power-Saving States” on page 3 - 6), the Fn + F4 key combination, or
power button to wake-up the system.
• Brightness - Check the brightness of the screen by pressing the Fn + F8 and F9 keys to adjust the bright-
ness.
• Display Choice - Press Fn + F7 to make sure the system is not set to “external only” display.
• Boot Drive - Make sure there are no optical media and/or USB storage devices in any connected drive
(this is a common cause of the message “Invalid system disk - Replace the disk, and then press any key” /
“Remove disks or other media. Press any key to restart”).