Frequently asked questions - 41• The brightness level might be too low. Press <Fn> + < > (increase) toadjust the brightness level.• The display device might be set to an external monitor. Press thedisplay toggle hotkey <Fn> + <F5> to toggle the display back to thecomputer.• If the Sleep indicator is lit, the computer is in Sleep mode. Press andrelease the power button to resume.No audio is heard from the computerCheck the following:• The volume may be muted. In Windows, look at the volume control(speaker) icon on the taskbar. If it is crossed-out, click the icon anddeselect the Mute all option.• The volume level may be too low. In Windows, look at the volumecontrol icon on the taskbar. You can also use the volume control buttonsto adjust the volume.• If headphones, earphones or external speakers are connected to theline-out port on the computer, the internal speakers automatically turnoff.The keyboard does not respondTry attaching an external keyboard to a USB port on the computer. If itworks, contact your dealer or an authorized service center as the internalkeyboard cable may be loose.