Acer a-550 Series manual No audio from the computer, External microphone does not work

TMa550.book Page 78 Wednesday, October 3, 2001 10:57 AM

78 6 Troubleshooting

tab to make sure the resolution is set to the 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 volume level may be too low. In Windows, look at the volume control icon on the taskbar. Click on the icon and adjust the level. You can also use the volume control knob on the front panel of the computer to adjust the volume.

If headphones, earphones or external speakers are connected to the speaker/headphone-out port on the computer, the internal speakers automatically turn off.

External microphone does not work.

Check the following:

•Make sure the external microphone is connected to the microphone-in jack on the computer.

•If you cannot hear playback, the speakers may be muted.

How do I eject the optical drive tray with the computer turned off?

There is a emergency eject hole on the optical drive. Simply insert the tip of a pen or paperclip and push to eject the optical drive tray. For the location of the emergency eject hole, see “Left view” on page 5.

The keyboard does not respond.

Try attaching an external PS/2 or USB keyboard to the appropriate port on the computer. If it works, contact your dealer or an authorized service center as the internal keyboard cable may be loose.

The floppy drive cannot access a diskette.

Check the following:

•Make sure the diskette is properly inserted in the floppy drive.

•Make sure the diskette is formatted.