Инструкция для Sony PCV-L640

There are independent controls for your system volume. 

Check that the speakers are plugged into the 

 connector.

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 

 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. 

The computer’s modem uses Lucent 1648 technology/V.90. Many factors 
influence modem connection speed, including telephone line noise or 
compatibility with telephone equipment (such as fax machines or other modems). 
If you think your modem is not connecting properly to other PC-based modems, 
fax machines, or your Internet Service Provider, check the following: 

Have your phone company check that your phone line is free from any line 
noise.

If your problem is fax-related, check that there are no problems with the fax 
machine you are calling and that it is compatible with fax modems.

For optimum performance, ensure you are calling an Internet Service 
Provider number that is V.90-compliant.

If you are having a problem connecting with your Internet Service Provider, 
check that the ISP is not experiencing technical problems.