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If you have been using your computer for some time, your files may have become fragmented. Run Disk Defragmenter. To do this, click Start, point to All Programs, Accessories, System Tools, and click Disk Defragmenter. 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, which is available from your dealer. 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. DVD-ROM or multi-function drive problems You cannot access a disc in the drive. Make sure the drive tray has closed properly. Press gently until it clicks into place. Open the drive tray and remove the disc. Make sure the drive tray is clean. Any dirt or foreign object can interfere with the laser beam. Examine the disc to see whether it is dirty. If necessary, wipe it with a clean cloth dipped in water or a neutral cleaner. Replace the disc in the tray. Make sure it is lying flat, label side uppermost. Press the disc down until it locks on the spindle. Close the drive tray carefully, making sure it has shut completely. You press the disc eject button, but the drive tray does not slide out. Make sure the computer is connected to a power source and turned on. The modular bay drive eject mechanism requires power to operate. To remove a disc without turning on the computer, use a narrow object, such as a straightened paper clip, to press the manual eject button. This button is in the small hole next to the disc eject button on the right side of the computer. Never use a pencil to press the manual eject button. Pencil lead can break off inside the computer and damage it. Pull the tray fully open, remove the disc and place it in its Some discs run correctly, but others do not. If the problem is with an application CD-ROM, refer to the software’s documentation and check that the hardware configuration meets the program’s needs. The color of the materials used to make the disc can affect its reliability. Silver-colored CD-ROMs are the most reliable, followed by gold-colored CD-ROM. Green-colored CDROMs are the least reliable. Sound system problems You do not hear any sound from the computer. Adjust the volume control. 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. Changing the settings for the Record Monitor feature in the Recording Control Utility (default Off), or the Mute feature in the Mixer Utility (default Enabled), may cause feedback. Revert to t...

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