Dell Vostro 270s (Late 2012) - Manual (Page 10)

Installing the Fan Shroud
1. Place the fan shroud over the processor fan and heat-sink assembly.
2. Press the fan shroud until the tabs on the fan shroud snap into place.
3. Install the cover.
4. Follow the procedures in After Working Inside Your Computer .
Removing the Drive Cage
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) cover
b) fan shroud
c) front bezel
3. Disconnect the power and data cables from the hard drive and the optical drive.
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