Gateway GT5448E - GT - 2 GB RAM Reference Manual page 62

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CHAPTER 4: Upgrading Your Computer
Find the memory module banks on your system board.
Gently pull the plastic tabs away from the sides of the
memory modules, then remove them.
Disconnect the power and data cables from the system
board, noting their locations and orientation. (You will
reconnect the cables after you install the new board.)
Remove the three screws that secure the power supply
to your computer.
Slide the power supply away from the back of your
computer, then pull it down and remove it.
Screws