138 If Something Goes Wrong

Sound system problems

Some programs run correctly but others do not.

This is probably a configuration problem. If a program does not run
properly, refer to its documentation and check that the hardware
configuration meets its needs.
Sound system problems

No sound is coming from the computer’s speakers.

Adjust the volume control.
Try pressing Fn + Esc to see if volume mute is disabled.
Check that the volume control on the computer is turned up.
If you are using external headphones or speakers, check that they
are securely connected to your computer.

The computer emits a loud, high-pitched noise.

This is feedback between the microphone and the speakers. It
occurs in any sound system when input from a microphone is fed to
the speakers and the speaker volume is too loud. Adjust the volume
control.
Wireless networking problems
This section provides general troubleshooting tips for networking
problems, specifically wireless (Wi-Fi®) networking.
The terms and concepts used assume a basic understanding of
networks, and may be for more advanced users. If you need
assistance or if you are not familiar with the terminology, please see
Windows® Help and Support or contact your computer technician.
❖If your computer is equipped with an internal Wi-Fi® adapter,
verify that the Wireless antenna is ON (the wireless indicator
light will be lit).
❖Verify that your computer can detect access points or routers. If
it can detect a Wi-Fi® access point or router then it may be a
configuration issue.
❖Verify that signal strength is good using the utility provided
with the Wi-Fi® adapter.
❖If another computer is on the same network, verify that it has
network access, and can connect to the Internet. If, for
example, the other computer cannot browse to a public Web
NOTE