Dell T5400 48 , press the up- and down-arrow keys

48 Quick Reference Guide
RESTART THE COMPUTER —
1 Simultaneously press <Ctrl><Esc> to display the Start menu.
2 Press <u>, press the up- and down-arrow keys to highlight Shut down or Turn Of f ,
and then press <Enter>.
3 After the computer turns off, reconnect the mouse cable as shown on the setup diagram.
4 Turn on the computer.
TEST THE MOUSE —Connect a properly working mouse to the computer, then try
using the mouse.
CHECK THE MOUSE SETTINGS —
Windows XP:
1 Click Start → Control Panel → Mouse .
2 Adjust the settings as needed.
Windows Vista:
1 Click Start → Control Panel → Hardware and Sound → Mouse .
2 Adjust the settings as needed.
REINSTALL THE MOUSE DRIVER —See "Drivers" in your User’s Guide.
RUN THE HARDWARE TROUBLESHOOTER—See "Restoring Your Operating System"
in your User’s Guide.
Network Problems
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions in the
Product Information Guide .
CHECK THE NETWORK LIGHT ON THE FRONT OF THE COMPUTER —If the link
integrity light is off (see "Controls and Lights" in your User’s Guide), no network
communication is occurring. Replace the network cable.
CHECK THE NETWORK CABLE CONNECTOR —Ensure that the network cable is firmly
inserted into the network connector on the back of the computer and the network jack.
RESTART THE COMPUTER AND ATTEMPT TO LOG ON TO THE NETWORK AGAIN
CHECK YOUR NETWORK SETTINGS —Contact your network administrator or the
person who set up your network to verify that your network settings are correct and
that the network is functioning.
RUN THE HARDWARE TROUBLESHOOTER—See "Restoring Your Operating System"
in your User’s Guide.