Acer AT350 F2 Series Service Manual page 125

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?
• Is the display monitor signal cable properly connected?
• Does this display monitor work correctly if plugged into a different
system?
• Remove all add-in cards and see if the system boots.
If reboot is successful, install the cards back in one at a time with a
reboot between each addition to determine if one of them is causing
the problem.
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