Adding and Replacing Parts 121Returning a Hard Drive to DellReturn your old hard drive to Dell in its original or comparable foam packaging. Otherwise, the harddrive may be damaged in transit.MemoryYou can increase your computer memory by installing memory modules on the system board. See"Specifications" on page 137 for information on the memory supported by your computer. Install onlymemory modules that are intended for your computer.NOTE: To take advantage of the dual-channel bandwidth capability, install a matching memory module in bothmemory module connectors.NOTE: Memory modules purchased from Dell are covered under your computer warranty.CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodicallytouching an unpainted metal surface (such as a connector on the back of the computer).NOTICE: To avoid damaging the system board, you must remove the battery before you begin working inside thecomputer.1 Follow the procedures in "Before You Begin" on page 117.2 Ground yourself by touching one of the metal connectors on the back of the computer.NOTE: If you leave the area, ground yourself again when you return to the computer.1 foam packaging 2 hard drive21PD598a01.book Page 121 Monday, February 6, 2006 2:24 PM