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2. If the computer is connected to a docking device (docked), undock it. See the documentation that came with your docking device for instructions. 3. Close the display and turn the computer upside-down. 4. If present, remove the M2 x 3-mm device security screw from the bottom of the computer. 5. Press in the device latch release, and pull the drive out of the media bay. To replace the drive into the media bay, push the new device into the bay until it clicks, then replace the M2 x 3-mm security screw (if present). Back to Contents Page NOTE: If the device security screw is not present, you can remove and install devices while the computer is running and connected to a docking device (docked). 1 M2 x 3-mm security screw 2 device latch release Back to Contents Page Memory Module(s) Dell™ Latitude™ D520 Service Manual Memory DIMM A DIMM B Memory You can increase your computer memory by installing memory modules on the system board. See the "Specifications" section in your User's Guide for information on the memory supported by your computer. Install only memory modules that are intended for your computer. The computer has two memory module connectors labeled "DIMM A" and "DIMM B." DIMM A is located on top of the system board (under the keyboard), and DIMM B is located on the bottom of the system board under the memory module cover. If only one memory module is installed, it must be installed in DIMM A, as configured from the factory. If you did not order additional memory, DIMM B is empty. Generally, if you add memory, you add by installing a memory module in DIMM B. If you are upgrading memory, you may need to remove and install memory modules in both DIMM A and DIMM B, depending on the extent of the upgrade. DIMM A 1. Follow the procedures in Before You Begin. 2. Remove the hinge cover (see Hinge Cover). 3. Remove the keyboard (see Keyboard). 4. Ground yourself by touching one of the metal connectors on the back of the computer. 5. If you are replacing a memory module, remove the existing module: a. Use your fingertips to carefully spread apart the securing clips on each end of the memory module connector until the module pops up. b. Remove the module from the connector. 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 Product Information Guide. NOTICE: To prevent damage to the system board, remove the main battery before you service the computer. NOTICE: If you leave the area, ground yourself again when you return to the computer. NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory- module securing clips. 1 memory module 2 securing clips (2) NOTICE: Insert memory modules at a 45-degree angle to prevent damage to the connector. NOTE: If the memory module is not installed properly, the computer may not boot properly. No error message indicates this failure. 6. Ground yourself and install the new memory module: a. Align the notch in the module edge connector with the tab in the connector slot. b. Slide the module firmly into the slot at a 45-degree angle, and rotate the module down until it clicks into place. If you do not feel the click, remove the module and reinstall it. 7. Replace the keyboard (see Keyboard). 8. Replace the hinge cover (see Hinge Cover). 9. Insert the battery into the battery bay, or connect the AC adapter to your computer and an electrical outlet. 10. Turn on the computer. As the computer boots, it detects the additional memory and automatically updates the system configuration information. To confirm the amount of memory installed in the computer, click Start, click Help and Support, and then click Dell System Information. DIMM B 1. Follow the procedures in Before You Begin. 2. Turn the computer upside-down, loosen the captive screw on the cover, and then remove the cover. 3. If you are replacing a memory module, remove the existing module: a. Use your fingertips to carefully spread apart the securing clips on each end of the memory module connector until the module pops up. b. Remove the module from the connector. NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory-module securing clips. 1 securing clips (2) 2 memory module 4. Ground yourself and install the new memory module: a. Align the notch in the module edge connector with the tab in the connector slot. b. Slide the module firmly into the slot at a 45-degree angle, and rotate the module down until it clicks into place. If you do not feel the click, remove the module and reinstall it. 5. Replace the memory module cover and tighten the screw. 6. Insert the battery into the battery bay, or connect the AC adapter to your computer and an electrical outlet. 7. Turn on the computer. As the computer boots, it detects the additional memory and automatically updates the system configuration information. To confirm the ...