Toshiba protege pt225u00v004 Manuel D’Utilisation

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If Something Goes Wrong
Sound system problems
Your hard disk seems very slow.
If you have been using your computer for a long time, your files 
may have become fragmented. Run Disk Defragmenter. 
To do this, click StartAll ProgramsAccessoriesSystem Tools
and then Disk Defragmenter. After it opens, click Defragment 
disk
.
Your data files are damaged or corrupted.
Refer to your software documentation for file recovery procedures. 
Many software packages automatically create backup files.
You may also be able to recover lost data using utility software. 
Consult your network administrator.
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.