HP Dc7700 HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Ed - Page 236

Troubleshooting Without Diagnostics Solving Audio Problems (Continued) Problem Cause Sound does not come out of the speaker or headphones. (continued) External speakers plugged into the wrong audio jack. Digital CD audio is not enabled. Headphones or devices connected to the line-out connector mute the internal speaker. Volume is muted. Computer is in standby mode. Sound from headphones is not clear or muffled. Headphones are plugged into the rear audio output connector. The rear audio connector is for powered audio devices and is not designed for headphone use. Solution See the sound card documentation for proper speaker connection. Enable digital CD audio: 1. From the Control Panel, select System. 2. On the Hardware tab, click the Device Manager button. 3. Right-click on the CD/DVD device and select Properties. 4. On the Properties tab, make sure "Enable digital CD audio for this CD-ROM device" is checked. Turn on and use headphones or external speakers, if connected, or disconnect headphones or external speakers. 1. From the Control Panel program, click Sound, Speech and Audio Devices, then click Sounds and Audio Devices. 2. Click the Mute check box to remove the check mark from the box. Press the power button to resume from standby mode. Ä When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and any unsaved data will be lost. Plug the headphones into the headphone connector on the front of the computer. D-18 433612-001 Service Reference Guide, dc7700