Dell Precision 490 - Manual (Page 129)

14. If metal shields are present in your computer (see About the Metal Shields Present in Some Drive Configurations ), replace metal shields in any empty
optical drive bays or over the FlexBay, in tower mode only, by pressing them into place.
15. If a vented metal insert was installed over the FlexBay and you are converting from tower to desktop mode, reinstall it:
a. Holding the metal insert at an angle, insert its two upper screws into the slot that runs along the inside of the FlexBay.
b. Rotate the bottom of the vented metal insert down and insert its two bottom screws into the slot in the open area beneath the FlexBay.
c. Push the vented metal insert until it clicks into place and its metal tabs rest flush against the chassis surface.
16. Install the new drive panel (see Replacing the Drive Panel ).
17. Replace the computer cover (see Replacing the Computer Cover ).
18. Verify that your computer works correctly by running the Dell Diagnostics .
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NOTE: Hard-drive screws or a hard-drive carrier can be ordered from Dell. See Contacting Dell .
1 FlexBay
2 vented metal insert