179Replacing the system boardwww.gateway.com6 Install the new power supply into the case, then install the four retentionscrews to secure the power supply to the case.7 Reconnect the power supply cables using your notes from Step 3. See thepower supply documentation for further instructions.8 Close the case by following the instructions in “Closing the case” onpage 166.Replacing the system boardTo replace the system board:1 Remove the side panel by following the instructions in “Removing the sidepanel” on page 162.2 For more stability, place your computer on its side. To avoid scratchingthe case, place it on a towel or other non-abrasive surface.3 Remove all of the add-in cards by following the instructions in “Addingor replacing add-in cards” on page 173.4 Disconnect the power and data cables from the system board, noting theirlocations and orientation. (You will reconnect the cables after you installthe new board.)