Dell Vostro 470 (Mid 2012) - Manual (Page 7)

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Removing The Cover
1. Follow the procedures in Before working Inside your computer.
2. Remove the two thumbscrews securing the computer cover to the computer.
Figure 1.
3. Slide the computer cover towards the back of the computer, and then remove it from the computer.
Figure 2.
4. Lift the computer cover away from the computer.
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