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100 Troubleshooting
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.
C
HECK THE NETWORK LIGHTS ON THE BACK OF THE COMPUTER — If the link
integrity light is off (see "Controls and Lights" on page 32), no network
communication is occurring. Replace the network cable.
R
ESTART THE COMPUTER AND 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.
R
UN THE HARDWARE TROUBLESHOOTER — See "Troubleshooting Software and
Hardware Problems in the Microsoft
®
Windows
®
XP and Microsoft Windows Vista™
Operating Systems" on page 131.
Power Problems
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions in the
Product Information Guide
.
I
F THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See
"Diagnostic Lights" on page 105.
I
F THE POWER LIGHT IS BLINKING GREEN — The computer is in standby mode.
Press a key on the keyboard, move the mouse, or press the power button to resume
normal operation.
I
F THE POWER LIGHT IS OFF — The computer is either turned off or is not receiving
power.
• Reseat the power cable in the power connector on the back of the computer and the
electrical outlet.
• Bypass power strips, power extension cables, and other power protection devices to
verify that the computer turns on properly.
• Ensure that any power strips being used are plugged into an electrical outlet and are
turned on.
• Ensure that the electrical outlet is working by testing it with another device, such as a
lamp.
• Ensure that the main power cable and front panel cable are securely connected to the
system board (see "System Board Components" on page 27).
IF THE POWER LIGHT IS BLINKING AMBER — The computer is receiving electrical
power, but an internal power problem may exist.