Acer AT110 Series, User Manual

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5 System troubleshooting 72
Network connection indicators do not light.
Do the following:
•
Check the cabling and network equipment to make sure that they
are in proper condition.
• Reinstall the network drivers.
• Try another port or hub on the switch.
Network activity indicators do not light.
Do the following:
•
Make sure the correct network drivers are loaded on the system.
• Network might be idle.
Peripheral device connected to a USB port does not work.
Do the following:
• Reduce the number of external devices connected to a USB hub.
• Refer to the documentation that came with the device.
There is problem with the software program.
Do the following:
• Verify that the software is properly configured for the system.
Refer to the software installation and operation documentation
for instructions on setting up and using the software.
• Try a different version of the software to see if the problem is with
the copy you are using. If the other version runs correctly on the
system, contact your vendor about the defective software.
No characters appear on the display monitor.
Check the following:
• Is the keyboard functioning? Test it by turning the Num Lock
function on and off to check if the Num Lock indicator lights up.
• Is the display monitor plugged in and turned on? If you are using a
switch box, is it switched to the correct system?
• Are the brightness and contrast controls on the video monitor
properly adjusted?