HP dx7200 HP Compaq Business PC dx7200 MT Service Reference Guide, 1st edition - Page 190
Solving Audio Problems, Security > Device - audio driver
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Troubleshooting Without Diagnostics Solving Audio Problems Solving Audio Problems Problem Cause Errors when installing audio drivers. The HP audio codec requirs that Microsoft Universal Architecture (UAA) drivers, which provide support for the HD audio bus, to be installed before the audio codec driver can be installed. (UAA drivers are different for each operating system (OS) and OS service pack.) Sound cuts in and out. Processor resources are being used by other applications. Direct sound latency, common in many media player applications. Sound does not come out of the speaker or headphones. Software volume control is turned down. The external speakers are not turned on. Audio is hidden in Computer Setup. Solution Install the Microdoft UAA driver before installing the Realtek driver. Shut down all open processor-intensive applications. In Windows XP: 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. Double-click the Speaker icon on the taskbar and use the volume slider to adjust the volume. Turn on the external speakers. Enable the audio in Computer Setup: Security > Device Security >Audio. D-14 390812-001 Service Reference Guide, dx7200