— Power Savings - Make sure that the system is not in Hibernate or Sleep mode use power button to
wake-up the system.
— Brightness - Check the brightness of the screen by pressing the Fn+ and Fn+ keys to adjust the
brightness.
— Display Choice - Press Fn + F3 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”).
— Check to see if the problem persists when all the external devices are removed.
— Check to see the power cord is properly plugged to the wall outlet and to the computer.
— Check to see the power indicator of the computer is on.
— Check to see if your keyboard is operational by pressing and holding any key.
— Check for any incorrect or loose cable connections. Make sure the latches on the connectors latch
securely on to the receptor end.
— Be sure you have not performed an incorrect setting on the hardware devices in the BIOS Setup
utility. A faulty setting may cause the system to misbehave. If you are not sure of the changes you
made, try to restore all the settings to factory defaults.
— Be sure all the device drivers are installed properly. For example, without the audio driver properly
installed, the speakers and microphone will not work.
5-2
User's Guide
Troubleshooting
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