The Motherboard install process is exactly the same as any ATX mini tower PC. However, note the removable metal standoff (pointed at with the screw driver) that should be removed on older machines.  There shold be no standoffs that contact the back of the motherboard that do not align to an open screw mounting hole.

| Step 2 | Step 3 | Step 4 | Step 5 | Step 6 | Step 7 | Step 8 | Step 9 | Step 10 | Step 11 |