Dell OptiPlex GX270 - Manual (Page 166)

Network Problems
Power Problems
Fill out the Diagnostics Checklist as you complete these checks.
1. Simultaneously press to display the Start menu.
2. Type u, press the keyboard arrow keys to highlight Shut down or Turn Off, and then press .
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 mouse cable is connected to the green connector on the back panel.
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 and Windows NT®
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 ."
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 —
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 " Safety Instructions ."
Adjust the Power Properties — Your computer may be in standby or hibernate mode. For information on power conservation modes, see
your operating system documentation.
If the power light is green and the computer is not responding — See " Diagnostic Lights ."
If the power light is blinking green — The computer is in standby mode. Press a key on the keyboard or move the mouse to resume normal
operation.
If the power light is off — The computer is either turned off or is not receiving power.
l Reseat the power cable into both the power connector on the back of the computer and the electrical outlet.
l 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