8-8 Troubleshooting If you are sure the operation has stop, reset the computer. (See“Resetting the Computer” later in this chapter.)Sound ProblemsNo sound is produced. Make sure that the volume control is not set too low. Make sure that the computer is not in Sleep mode. If using an external speaker, make sure that the speaker is properlyconnected.Distorted sound is produced. Make sure that the volume control is not set too high or too low. In mostcases, a high setting can cause the audio electronics to distort the sound.The sound system does not record. Adjust the playback or recording sound levels.The external microphone or audio device does not work. Make sure that the microphone is connected to the proper connector onthe computer. Click the speaker symbol on the taskbar and check the Windows volumecontrol. Check the volume control of your computer.Startup ProblemsWhen you turn on the computer, it does not seem to respond. Make sure that either the AC adapter is connected or the battery haspower. For models with the hard disk drive heater option: When turning on thecomputer in an extremely low temperature environment, the computerwill heat up the hard disk before starting up. The hard disk drive in-useindicator blinks red to indicate the heater is on. (In conditions where the
