Mouse Problems; Network Problems; Power Problems - Dell OptiPlex SX280 User Manual

Run the Dell Diagnostics.
l

Mouse Problems

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
Clean the mouse — See "Cleaning Your
Check the mouse cable —
1. Remove and reconnect the mouse cable as shown in the Quick Reference Guide for your computer.
Check the mouse settings —
Windows XP
1. Click the Start button, click Control Panel, and then click Printers and Other Hardware.
2. Click Mouse.
3. Try adjusting the settings.
Run the Dell Diagnostics
Check for Software and Hardware Conflicts

Network Problems

Fill out the Diagnostics Checklist as you complete these checks.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
Check the network cable connector —
computer and the network jack.
Check the network lights on the back of the computer —
off, no network communication exists. Replace the network cable.
Restart the computer and log on to the network again
Check your network settings —
settings are correct and that the network is functioning.
Check for Software and Hardware Conflicts

Power Problems

Fill out the Diagnostics Checklist as you complete these checks.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
If the power light is green and the computer is not responding —
"Diagnostic Lights."
If the power light is blinking green —
If the power light is yellow and green or steady yellow —
or incorrectly installed.
Remove and then reinstall the memory modules.
l
Reseat the processor (see "Processor.")
l
If the power light is off — The computer is either turned off or is not receiving power.
Reseat the power cable into both the power connector on the back of the computer and the connector on the adapter. Then, ensure
l
that the adapter is properly connected to an electrical outlet.
If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and that the power strip
l
is turned on. Also bypass power protection devices, power strips, and power extension cables to verify that the computer turns on
Computer."
Ensure that the network cable is firmly inserted into both the network connector on the back of the
Check the network lights on the back of the computer. If the link integrity light is
Contact your network administrator or the person who set up your network to verify that your network
The computer is in standby mode. Press the power button to resume normal operation.
The computer is receiving electrical power, but a device might be malfunctioning
Check the diagnostic lights on the back of your computer and see