Sony VAIO PCG-C1X Service Manual page 117

Check that the phone number the program is dialing is correct.
Check that the software you are using is compatible with the
computer modem. (All preinstalled programs are compatible.) Call
the software publisher.
My modem connection is slow
The computer's modem uses K56flex
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, 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 mouse does not work
If you are using an external mouse, check that the mouse is plugged
into the USB connector. See "Connecting an External USB Mouse" on
page 38 for details.
I cannot use DV devices and messages appear on the screen
Check that the DV device is turned on and that the cables are
properly connected.
If you are using multiple i.LINK devices, the combination of the
connected devices may cause unstable operation. In this case, turn off
the power to all connected devices and disconnect unused devices.
Check the connection, then turn on the power again.
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