Dell OptiPlex 755 User's Guide - Page 142
Hard Drive, Remove the computer cover see Removing the Computer Cover
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6 Replace the optical drive (see "Optical Drive" on page 131). 7 Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents. 8 Replace the computer cover (see "Replacing the Computer Cover" on page 317). 9 Verify that your computer works correctly by running the Dell Diagnostics (see "Dell Diagnostics" on page 353). Hard Drive CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the computer cover. NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushion it. Removing a Hard Drive 1 If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure. 2 Check the documentation for the drive to verify that it is configured for your computer. 3 Follow the procedures in "Before You Begin" on page 21. 4 Remove the computer cover (see "Removing the Computer Cover" on page 90). NOTE: Since the following steps do not require the complete removal of the optical drive and the floppy drive, it is not necessary to disconnect the cables connecting the two drives. 5 Remove the optical drive from the bay and carefully set it aside (see "Optical Drive" on page 131). 6 Remove the floppy drive from the 3.5-inch bay and carefully set it aside (see "Floppy Drive" on page 134). 7 Press in on the two plastic securing clips on each side of the drive and slide the drive towards the back of the computer. NOTICE: Do not pull the drive out of the computer by the drive cables. Doing so may cause damage to cables and the cable connectors. 8 Lift the drive out of the computer and disconnect the power and data cables from the drive. 142 Drives