Dell OptiPlex SX270N - Manual (Page 91)

Mouse Problems
Fill out the Diagnostics Checklist as you complete these checks.
Network Problems
Power Problems
Restart the computer —
1. Simultaneously press <Ctrl><Esc> to display the Start menu.
2. Type u, press the keyboard arrow keys to highlight Shut down or Turn Off, and then press <Enter>.
3. After the computer turns off, press the power button to restart the computer.
Check the mouse cable —
l Check the cable connector for bent or broken pins and for damaged or frayed cables. Straighten bent pins.
l Ensure that the cable is firmly connected to the computer.
Test the mouse — Connect a properly working mouse to the computer, and try using the mouse. If the new mouse works, the original
mouse was faulty.
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.
Windows 2000, Windows NT ® , and Windows 98
1. Click the Start button, point to Settings, and then click Control Panel.
2. Double-click the Mouse icon.
3. Try adjusting the settings.
If you are using a PS/2 mouse
1. Enter system setup and ensure that Mouse Port under the Integrated Devices option is set to On.
2. Exit system setup and restart the computer.
Reinstall the mouse driver — See " Reinstalling Drivers and Utilities ."
Run the Dell Diagnostics — If any of the diagnostics tests fail, contact Dell .
Check for interrupt request conflicts — See " Resolving Software and Hardware Incompatibilities ."
Check the network cable connector — Ensure that the network cable is firmly inserted into both the network connector on the back of the
computer and the network jack.
Check the network lights on the back of the computer —
If the network adapter lights are blank (off) it indicates that a physical connection to the network cannot be detected or that the integrated
network adapter is disabled in System Setup.
Restart the computer and try 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.
Check for interrupt request conflicts — See " Resolving Software and Hardware Incompatibilities ."
CAUTION: Before you begin any of the procedures in this section, follow the steps in " CAUTION: Safety Instructions ."