Sony PCG-F420 Primary User Manual page 74

The computer's modem uses V.90 technology. 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.
If you are using an external microphone, check that the microphone is
plugged into the Microphone connector. See "Connecting an External
Microphone" on page 55 for details.
❑
If you are using an external mouse, check that the mouse is plugged
into the mouse connector. See "Connecting an External Mouse or
Keyboard" on page 53 for details.
❑
If you connected an external mouse while your computer is on, you
must restart your computer.
❑
If you are using an optional Sony USB mouse PCGA-UMS1, check
that the mouse is plugged into the USB connector.
You may have disabled the touchpad while no mouse was connected to
the computer. If so, you must restart the computer to make the touchpad
work again.