Power problems – Dell Precision T7400 (Late 2007) User Manual
Page 100

100
Troubleshooting
C
H E C K
T H E
N E TW O R K
CA BLE
C O N N E CT O R
— Ensure that the network cable is firmly
inserted into the network connector on the back of the computer and the network
jack.
C
H E C K
T H E
N E TW O R K
L I G H T S
O N
T H E
BA CK
O F
T H E
C O M PU T ER
— If the link
integrity light is off (see "Controls and Lights" on page 32), no network
communication is occurring. Replace the network cable.
R
E ST A R T
T H E
CO M P U T E R
A N D
L O G
O N
T O
T H E
N E T W O R K
A G A I N
C
H E C K
Y O U R
N E T W O R K
S E T T I N G S
— 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
U N
T H E
H
A R D W A R E
T
R O U B L E S H O O T E R
— See "Troubleshooting Software and
Hardware Problems in the Microsoft
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
T H E
P O WE R
L I G H T
I S
G RE E N
A N D
T H E
C O M PU T E R
I S
N O T
R ES P O N D I N G
— See
"Diagnostic Lights" on page 105.
I
F
T H E
P O WE R
L I G H T
I S
B L I N K I N G
G RE E N
— 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
T H E
P O WE R
L I G H T
I S
O F F
— 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).
I
F
T H E
P O WE R
L I G H T
I S
B L I N K I N G
A MB E R
— The computer is receiving electrical
power, but an internal power problem may exist.