Dell Precision 5520 Owners Manual - Page 30
re-connect them correctly after you replace the system board.
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NOTE: Your computer's Service Tag is located under the system badge flap. You must enter the Service Tag in the BIOS after you replace the system board. NOTE: Before disconnecting the cables from the system board, note the location of the connectors so that you can re-connect them correctly after you replace the system board. 3. Remove the M2x2 screw securing the metal bracket for the LVDS to the system board [1] and remove the bracket off the computer [2]. Then, disconnect the LVDS cable from the system board [3]. 4. Slide out the connector latches to disconnect all the cables from the system board. 5. Perform the following steps to remove the system board from the computer: a) Remove the five M2x4 screws that secure the system board to the computer [1]. b) Lift the system board off the computer [2]. 30 Disassembly and reassembly