Dell Precision T7400 Quick Reference Guide  - Page 24

Floppy Drive NOTICE: Do not attempt to clean drive heads with a swab. The heads may become misaligned and prevent 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. 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. Troubleshooting Tools Power Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. The power button light located on the front of the computer illuminates and blinks or remains solid to indicate different states: • If the power light is green and the computer is not responding, "Diagnostic Lights" on page 26. • If the power light is blinking green, the computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation. 24 Quick Reference Guide