AOpen 1557 User Manual page 84

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appropriate resolution. Resolutions lower than the specified resolution are not
full-screen on the computer or on an external monitor.
No audio from the computer.
Check the following:
• The volume may be muted. In Windows, look at the volume control icon on
the taskbar. If it is crossed-out, click on the icon and deselect the Mute
option.
• The speakers may be turned off. Press Fn-F5 to turn the speakers on (this
hotkey also turns the speakers off).
• The volume level may be too low. Adjust the volume control knob near the
left rear side of your computer. In Windows, look at the volume control icon
on the taskbar. Click on the icon and adjust the level.
If headphones, earphones or external speakers are connected to the line-out port on
the computer's rear panel, the internal speakers automatically turn off.
The keyboard does not respond.
Try attaching an external keyboard to the USB connector on the computer's rear.
If it works, contact your dealer or an authorized service center as the internal
keyboard cable may be loose.
The printer does not work.
Check the following:
• Make sure that the printer is connected to a power outlet and it is turned on.
• Make sure the printer cable is connected securely to the computer's USB port
and the corresponding port on the printer.
I want to set up my location to use the internal modem.
To properly use your communications software (e.g., HyperTerminal), you need to
set up your location:
1. Click on Start, Control Panel; then double-click on the Phone and Modem
Options icon.
2. Begin setting up your location.
Refer to the Windows manual.
Why can't I charge my battery to 100% charged when it is 99-95%
6 Troubleshooting