Operation Manual
Symptom Possible solution
Press and hold the power button on the computer for 5 or more seconds to turn o the computer, and then press the power
button to turn on the computer.
Error message: Invalid
system disk or Non-
System disk or Disk
error
When drive activity stops, remove the optical disc inside the optical drive, and then press the spacebar on the keyboard.
Power
Symptom Possible solution
Computer does not
turn o when the
power button is
pressed
Press and hold the power button until the computer turns o. Then turn the computer on again.
Computer shuts down
automatically
●
The computer might be in an exceedingly hot environment. Let it cool down.
●
Be sure that computer air vents are not blocked. See Cleaning your computer on page 30.
NOTE: If your computer has an internal fan, be sure that the internal fan is running.
Display (monitor) (select products only)
Symptom Possible solution
Screen is blank, and
monitor power light is not
lit
Reconnect the power cable to the back of the monitor and to the AC outlet.
Press the power button on the monitor.
Screen is blank Press the space bar on the keyboard or move the mouse to redisplay the screen image.
Press the Sleep button (select products only), or esc, to resume from Sleep mode.
Press the power button to turn on the computer.
Inspect the monitor cable for bent pins.
●
If any of the pins are bent, replace the monitor cable.
●
If no pins are bent, reconnect the monitor cable to the computer.
Images on the screen are
too large or too small, or
the images are fuzzy
Adjust the monitor resolution setting in Windows.
1. Type screen resolution in the taskbar search box, and then select Change the screen resolution.
2. Select a dierent resolution from the drop-down menu.
3. Select Apply, and then select Keep changes.
NOTE: In addition to the information listed here, also refer to the documentation that came with your monitor.
18 Chapter 7 Troubleshooting