Dell Dimension 8400 Owner's Manual - Page 46

www.dell.com | support.dell.com RUN THE SPEAKER DIAGNOSTICS R E I N S T A L L T H E S O U N D D R I V E R - See page 55. R U N T H E H A R D W A R E TR O U B L E S H O O T E R - See page 58. No sound from headphones C H E C K T H E H E A D P H O N E C A B L E C O N N E C T I O N - Ensure that the headphone cable is securely inserted into the headphone connector (see page 61). A D J U S T T H E W I N D O W S V O L U M E C O N T R O L - Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted. Video and Monitor Problems See the monitor documentation for troubleshooting procedures. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. If the screen is blank CHECK THE MONITOR CABLE CONNECTION - • Ensure that the graphics cable is connected as shown on the setup diagram for your computer. • If you are using a graphics extension cable and removing the cable solves the problem, the cable is defective. • Swap the computer and monitor power cables to determine if the power cable is defective. • Check the connector for bent or broken pins. (It is normal for monitor cable connectors to have missing pins.) C H E C K T H E M O N I T O R P O W E R L I G H T - If the power light is off, firmly press the button to ensure that the monitor is turned on. If the power light is lit or blinking, the monitor has power. If the power light is blinking, press a key on the keyboard or move the mouse. 46 Solving Problems