Dell Vostro 470 Owner's Manual - Page 30

Remove the screws that secure the power supply unit to the computer chassis.

Page 30 highlights

5. Disconnect the power supply cable from the back of the optical drive. Figure 27. 6. Disconnect the power supply cable from the system board. Figure 28. 7. Remove the screws that secure the power supply unit to the computer chassis. 30

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5.
Disconnect the power supply cable from the back of the optical drive.
Figure 27.
6.
Disconnect the power supply cable from the system board.
Figure 28.
7.
Remove the screws that secure the power supply unit to the computer chassis.
30