User`s guide

Troubleshooting 8-13
Startup Problems
When you turn on the computer, it does not respond and the Power
Status Indicator does not light green.
 If you are using an external AC power, make sure that the AC adapter
is correctly and securely connected. If so, make sure that the
electrical outlet works properly.
 If you are using the battery power, make sure that the battery is not
discharged.
When you turn on the computer, it stops after POST.
 Restart your computer.
The message “Operating system not found” appears on the
screen after you turn on the computer.
 If this message appears when you are booting from the hard disk,
insert a bootable disc in the DVD drive and check the condition of the
hard disk.
The message “Invalid system disk” or “Disk error” appears
on the screen after you turn on the computer.
 If you are deliberately trying to boot from a disc, replace the disc with
a bootable one and press any key to continue booting.
 If this message appears when you are booting from the hard disk,
insert a bootable disc in the DVD drive and check the condition of the
hard disk.
Other Problems
The date/time is incorrect.
 Correct the date and time via the operating system or BIOS Setup
program.
 After you have performed everything as described above and still
have the incorrect date and time every time you turn on the computer,