HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 267
Solving Audio Problems, Table D-7
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Table D-6 Solving Display Problems (continued) Certain typed symbols do not appear correct. Cause Solution Tools > Character Map. You can copy the symbol from the Character Map into a document. Solving Audio Problems If the computer has audio features and you encounter audio problems, see the common causes and solutions listed in the following table. Table D-7 Solving Audio Problems Sound cuts in and out. Cause Solution Processor resources are being used by other open applications. Direct sound latency, common in many media player applications. Shut down all open processor-intensive applications. In Windows XP only: 1. From the Control Panel, select Sounds and Audio Devices. 2. On the Audio tab, select a device from the Sound Playback list. 3. Click the Advanced button and select the Performance tab. 4. Set the Hardware acceleration slider to None and the Sample rate conversion quality slider to Good and retest the audio. 5. Set the Hardware acceleration slider to Full and the Sample rate conversion quality slider to Best and retest the audio. Sound does not come out of the speaker or headphones. Cause Solution Software volume control is turned down or muted. Audio is hidden in Computer Setup. Double-click the Speaker icon on the taskbar, then make sure that Mute is not selected and use the volume slider to adjust the volume. Enable the audio in Computer Setup: Security > Device Security > System Audio. The external speakers are not turned on. The audio device may be connected to the wrong jack. External speakers plugged into the wrong audio jack on a recently installed sound card. Turn on the external speakers. Ensure that the device is connected to the correct jack on the computer. The speakers should be plugged into the rear lineout jack and the headphones should be plugged into the front headphone jack. See the sound card documentation for proper speaker connection. Solving Audio Problems 255