Dell Precision T7400 Quick Reference Manual

Also see for Precision T7400 DCDO: Quick reference guide Specification User guide Specifications Quick reference guide

24 Quick Reference GuideFloppy DriveNOTICE: Do not attempt to clean drive heads with a swab. The heads may becomemisaligned and prevent the drive from operating.Clean your floppy drive using a commercially available cleaning kit. Thesekits contain pretreated floppy disks to remove contaminants that accumulateduring normal operation.CDs and DVDsNOTICE: Always use compressed air to clean the lens in the CD/DVD drive, andfollow the instructions that come with the compressed air. Never touch the lensin the drive.1 Hold the disc by its outer edge. You can also touch the inside edge of thecenter hole.NOTICE: To prevent damaging the surface, do not wipe in a circular motion aroundthe disc.2 With a soft, lint-free cloth, gently wipe the bottom of the disc (the unlabeledside) 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 mildsoap. You can also purchase commercial products that clean discs andprovide some protection from dust, fingerprints, and scratches. Cleaningproducts for CDs are safe to use on DVDs.Troubleshooting ToolsPower LightsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in theProduct Information Guide.The power button light located on the front of the computer illuminates andblinks or remains solid to indicate different states:• If the power light is green and the computer is not responding, "DiagnosticLights" on page 26.• If the power light is blinking green, the computer is in standby mode. Pressa key on the keyboard, move the mouse, or press the power button to resumenormal operation.