How to Open the Case of a Dell Optiplex SX260

Written by sara williams
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The Dell Optiplex is a popular series of business computers, with its SX models being the miniature-sized computers that require a power brick to run. These computers sometimes come mounted to the backs of monitors, since they are space-saving computers. You can open the case of an SX260 Optiplex by pushing its green lever left or right. The case opens in two places, the top and the bottom. Remove the top cover to access the motherboard, memory and processor. You can remove the bottom cover to get to the hard drive.

Skill level:


  1. 1

    Shut the computer down; unplug it from the wall socket. Unplug the power brick from the back of the computer. Remove all connected devices. If your computer is attached to a mounting plate or stand, remove the plate or stand before attempting to open the case.

  2. 2

    Lay the computer on its side with its ports on top and the green lever on the bottom. Turn the computer around so the ports and green lever face you. Push the green lever -- located next to the ports and the bar code sticker -- to the right to pop off the case cover. Remove the case cover and put it aside.

  3. 3

    Replace the case cover by placing its edge slightly over the ports. Press down on the cover while pushing it forward until the lever clicks.

  4. 4

    Turn the computer over with the computer ports still facing toward you. Push left on the green lever by the ports to pop off the hard drive cover. Gently pull the cover up and turn the drive over, being careful not to damage the ribbon cable connecting the drive to the motherboard.

  5. 5

    Turn the drive cover over so its top faces you and the drive faces the computer. Line the cover up with the drive bay and push it back into place. Listen for the clicking of the green lever to tell you the drive is securely in its place.

Tips and warnings

  • Always turn off your computer and disconnect it from all power sources before working on its internal hardware. Work in on a clean, flat surface away from static hazards, such as carpeting or pets.

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