Sony PCV-RX490TV VAIO User Guide (primary manual) - Page 120
Topic: How do I change the video resolution of my display?, Topic: Why is there no sound in any
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Change to Current Document Title Topic: How do I change the video resolution of my display? 1 From the Start menu, select Settings, and then select Control Panel. 2 Click the Display icon and select the Settings tab. 3 Move the Display area slider to change the resolution. 4 Click OK. Topic: Why is there no sound in any application? There are independent controls for your system volume. ❑ Check that the speakers are plugged into the HEADPHONES jack. ❑ If the speakers have a mute button, make sure it is off. ❑ If the speakers are powered by batteries, check that the batteries are inserted properly and that they are charged. ❑ If the speakers use an external power source, make sure that the power cord is plugged into a grounded wall outlet or power strip. ❑ If the speakers have their own volume control, check the volume level. ❑ If the program you are using has its own volume control, check that the volume is turned up. ❑ Check the volume controls in the application, in the audio mixer, and in Windows. There is a volume control icon on the Windows® taskbar. Click the icon and slide the level bar up to increase the volume. ❑ Check that the Mute check box is not selected in the Windows volume control . ❑ If you connected headphones to the computer, you will not hear sound from the speakers. ✍ You may need to reinstall the sound drivers. See "Using the Driver Recovery CD" in this manual. 118