Sony PCG-F570 Manual

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Troubleshooting
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If you connect external speakers, check that the speakers are properly 
connected and the volume is turned up. 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 you have connected an audio cable to the Headphone connector, 
disconnect the cable.
My modem does not work
Check that the phone line is plugged into the line jack. See 
“Connecting a Phone Line” on page 52 for details.
Check that the phone line is working. You can check the line by 
plugging in an ordinary phone and listening for a dial tone.
Check that the phone number the program is dialing is correct.
Check that the software you are using is compatible with the 
notebook modem. (All preinstalled programs are compatible.) Call 
the software publisher or Sony Customer Support.
My modem connection is slow
Your notebook comes with a 56K/V.90-compatible modem. 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.
If you are having a problem connecting with your Internet Service 
Provider (ISP), check that the ISP is not experiencing technical 
problems.
If you have a second phone line available, try connecting the modem 
to that line.
My microphone does not work
If you are using an external microphone, check that the microphone is 
plugged into the Microphone connector. See “Connecting an External 
Microphone” on page 65
 for details.