Quick Reference Guide 45
TEST THE KEYBOARD — Connect a properly working keyboard to the computer, then 
try using the keyboard.
R
UN THE HARDWARE TROUBLESHOOTER — See "Restoring Your Operating System" 
in your User’s Guide.
Lockups and Software Problems
  CAUTION: Before you begin any of the procedures in this section, follow the 
safety instructions in the 
Product Information Guide
.
The computer does not start up
CHECK THE DIAGNOSTIC LIGHTS — See "Power Lights" on page 27.
E
NSURE THAT THE POWER CABLE IS FIRMLY CONNECTED TO THE COMPUTER AND TO 
THE ELECTRICAL OUTLET
The computer stops responding
  NOTICE: You may lose data if you are unable to perform an operating system shutdown.
T
URN THE COMPUTER OFF — If you are unable to get a response by pressing a key on 
your keyboard or moving your mouse, press and hold the power button for at least 
8 to 10 seconds (until the computer turns off), and then restart your computer.
A program stops responding
END THE PROGRAM —
1
Press <Ctrl><Shift><Esc> simultaneously to access the Task Manager.
2
Click the 
Applications
 tab.
3
Click to select the program that is no longer responding.
4
Click 
End Task
.
A program crashes repeatedly
  NOTE: Most software includes installation instructions in its documentation or on 
a floppy disk, CD, or DVD.
C
HECK THE SOFTWARE DOCUMENTATION — If necessary, uninstall and then reinstall 
the program.