120 Appendix
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2
Wipe the ball with a clean, lint-free cloth.
3
Blow carefully into the ball cage to dislodge dust and lint.
4
If the rollers inside the ball cage are dirty, clean the rollers with a cotton swab moistened
lightly with isopropyl alcohol.
5
Recenter the rollers in their channels if they are misaligned. Ensure that fluff from the swab is
not left on the rollers.
6
Replace the ball and retainer ring, and turn the retainer ring clockwise until it clicks into
place.

Floppy Drive

NOTICE: Do not attempt to clean drive heads with a swab. You might accidentally misalign the heads,
which prevents the drive from operating.
Clean your floppy drive using a commercially available cleaning kit. These kits contain pretreated
floppy disks to remove contaminants that accumulate during normal operation.

CDs and DVDs

NOTICE: Always use compressed air to clean the lens in the CD/DVD drive, and follow the instructions
that come with the compressed air. Never touch the lens in the drive.
If you notice problems, such as skipping, with the playback quality of your CDs or DVDs, try
cleaning the discs.
1
Hold the disc by its outer edge. You can also touch the inside edge of the center hole.
NOTICE: To prevent damaging the surface, do not wipe in a circular motion around the disc.
2
With a soft, lint-free cloth, gently wipe the bottom of the disc (the unlabeled side) in a
straight line from the center to the outer edge of the disc.
For stubborn dirt, try using water or a diluted solution of water and mild soap. You can also
purchase commercial products that clean discs and provide some protection from dust,
fingerprints, and scratches. Cleaning products for CDs are safe to use on DVDs.
Dell Technical Support Policy (U.S.Only)
Technician-assisted technical support requires the cooperation and participation of the customer
in the troubleshooting process and provides for restoration of the operating system, software
programs, and hardware drivers to the original default configuration as shipped from Dell, as well as
the verification of appropriate functionality of the computer and all Dell-installed hardware. In
addition to this technician-assisted technical support, online technical support is available at
support.dell.com
. Additional technical support options may be available for purchase.