Gateway GT4015 Hardware Reference Manual page 35

CHAPTER 3: Maintenance Basics
32
Remove the three screws that secure the power supply to your computer.
10
Slide the power supply away from the back of your computer, then pull
11
it down and remove it.
Remove the seven system board screws.
12
Lift the system board up and out of the case.
13
Align the new system board on the screw holes in the case, then secure
14
it into the case with the screws.
If your replacement system board does not include a processor, go to
15
Step 16.
-OR-
If your replacement system board includes a processor, go to
Screws
Screws
Screws
www.gateway.com
Step 20.