Dell Dimension 8100 - Manual (Page 46)

Rotating the Power Supply
To access some of the components on the system board, you may need to
rotate the system power supply out of the way:
1 Turn off the computer and peripherals, disconnect them from their
electrical outlets, and wait at least 5 seconds. Press and release the
power button to drain the power from the computer, and then remove
the computer cover (see page 42).
2 Make sure that the power cable is disconnected from the power
receptacle on the back of the power supply.
3 Free the power supply from the securing tab by pressing the release
tab. Then rotate the power supply upward until it locks in its extended
position.
4 Press and release the power button to drain the power from the
computer.
4 ^ I A d d i n g P a r t s