Network Problems; Power Problems; Troubleshooting Power Problems - Dell OptiPlex 755 User Manual

Windows XP
Click Start→ Control Panel→ Mouse.
1
Adjust the settings as needed.
2
Windows Vista:
Start
→ Control Panel→ Hardware and Sound→ Mouse.
Click
1
Adjust the settings as needed.
2
R
E I N S T A L L T H E M O U S E D R I V E R
R H T
U N T H E A R D W A R E R O U B L E S H O O T E R
® ®
Microsoft Windows XP and Microsoft Windows Vista

Network Problems

CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Information Guide
.
C
H E C K T H E N E T W O R K C A B L E C O N N E C T O R
connector on the back of the computer and the network jack.
C
H E C K T H E N E T W O R K L I G H T S O N T H E B A C K O F T H E C O M P U T E R
Lights" on page 345), no network communication is occurring. Replace the network cable.
R
E S T A R T T H E C O 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
to verify that your network settings are correct and that the network is functioning.
R H T
U N T H E A R D W A R E R O U B L E S H O O T E R
® ®
Microsoft Windows XP and Microsoft Windows Vista

Power Problems

Troubleshooting Power Problems

CAUTION:
. Before you begin any of the procedures in this section, follow the safety instructions in the
Information Guide
.
I
F T H E P O W E R L I G H T I S G R E E N A N D T H E C O M P U T E R I S N O T R E S P O N D I N G
page 347.
I
F T H E P O W E R L I G H T I S B L I N K I N G G R E E N
the mouse, or press the power button to resume normal operation.
I
F T H E P O W E R L I G H T I S O F F
• 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.
— See "Drivers" on page 356.
— See "Troubleshooting Software and Hardware Problems in the
— Ensure that the network cable is firmly inserted into the network
— Contact your network administrator or the person who set up your network
— See "Troubleshooting Software and Hardware Problems in the
— The computer is in standby mode. Press a key on the keyboard, move
— The computer is either turned off or is not receiving power.
®
Operating Systems" on page 358.
— If the link integrity light is off (see "System
®
Operating Systems" on page 358.
— See "Diagnostic Lights" on
Product
Product
339
Solving Problems