AcerAltos 9100B Series User’s Guide4-164.6Installing a System BoardThe housing accommodates various system board sizes.You can rearrange thepegs on the system board plate to fit the board that you wish to install.1.If you have not done so, open the housing following the steps in section 4.2.When ready, align the system board holes to the pegs with the external portsfacing the rear of the housing.3.Secure the board with eight screws.