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This article provides information on removing components from a OptiPlex 990 Mini Tower

Table of Contents:

1. Memory Removal
2. Intrusion Switch Removal
3. Internal speaker Removal
4. Heatsink/Processor Removal
5. Coin-Cell Battery Removal

Memory Removal

1. Pre-Removal Instructions Before removing the First Removal:

• During installation or removal of any hardware always ensure all data is backed up properly


• Disconnect any telephone, network, or USB cables from the computer


• Disconnect the computer and all attached devices from their electrical outlets


• Remove the system cover

2. Establishing image.



3. Press down on the memory retaining tabs on each side of the memory modules.



4. Lift the memory modules out of the connectors on the system board.



5. Complete.




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Intrusion Switch Removal

1. Pre-Removal Instructions Before removing the Second Removal:

• During installation or removal of any hardware always ensure all data is backed up properly


• Disconnect any telephone, network, or USB cables from the computer


• Disconnect the computer and all attached devices from their electrical outlets


• Remove the system cover

2. Establishing image.



3. Disconnect the intrusion cable from system board.



4. Slide the intrusion switch toward the chassis bottom and remove it from the chassis.



5. Complete.




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Internal Speaker Removal

1. Pre-Removal Instructions Before removing the Third Removal:

• During installation or removal of any hardware always ensure all data is backed up properly


• Disconnect any telephone, network, or USB cables from the computer


• Disconnect the computer and all attached devices from their electrical outlets


• Remove the system cover

2. Establishing image.



3. Disconnect the speaker cable from the system board.



4. Unthread the internal speaker cable from the chassis clip.



5. Press down the speaker securing tab and slide the Speaker upwards for removal.

6. Complete.



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Heatsink/Processor Removal

1. Pre-Removal Instructions Before removing the Fourth Removal:

• During installation or removal of any hardware always ensure all data is backed up properly


• Disconnect any telephone, network, or USB cables from the computer


• Disconnect the computer and all attached devices from their electrical outlets


• Remove the system cover

2. Establishing image.



3. Disconnect the heat sink/fan assembly cable from the system board.



4. Use a Phillips head screwdriver to loosen the four captive screws (1 > 2 > 3 > 4) securing the heat sink/fan assembly to the system board.



5. Lift the heat sink/fan assembly upward gently, and remove it from the system. Lay the assembly with the fan facing downward, and with the thermal grease facing upward.

6. Press the release lever down and then move it outward to release it from the retention hook that secures it.

7. Lift the processor cover.

8. Lift the processor to remove it from the socket and place it into antistatic packaging.

9. Complete.



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Coin-Cell Battery Removal

1. Pre-Removal Instructions Before removing the Fifth Removal

• During installation or removal of any hardware always ensure all data is backed up properly


• Disconnect any telephone, network, or USB cables from the computer


• Disconnect the computer and all attached devices from their electrical outlets


• Remove the system cover

2. Establishing image.



3. Carefully press the release latch away from the battery to allow the battery to pop up from the socket.



4. Lift the coin-cell battery out of the system and properly dispose of the battery.



5. Complete.




Return to the Optiplex 990 Teardown/Removal Index.


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