Screen is blank.
Images on the
screen are too
large or too small,
or the images are
Keyboard and mouse (with cable)
typing are not
recognized by the
Mouse (with cable)
does not work or
is not detected.
Cursor does not
move using the
arrow keys on the
Chapter 4 Troubleshooting and maintenance
Reconnect the power plug to the back of the computer and to the wall outlet.
Press the Power button to turn on the computer.
Press the space bar on the keyboard or move the mouse to make the screen display visible
Press the Sleep button (select models only), or the Esc key on the keyboard, to resume from
Adjust the display resolution setting in Windows 7:
Tap the Start button, and then tap Control Panel.
Under Appearance and Personalization, tap Adjust Screen Resolution.
Adjust resolution as necessary, and then tap Apply.
Use the mouse to turn off the computer, unplug and reconnect the keyboard to the back of
your computer, and then restart your computer.
Unplug and reconnect the mouse cable to your computer.
If the mouse is still not detected, turn off the computer, unplug and reconnect the mouse
cable, and then restart the computer.
Press Num Lock on the keyboard to turn off Num Lock, so that the arrow keys on the number
keypad can be used.