IBM IntelliStation A Pro 6217 Service Manual page 155

Figure 43. System board removal
9. Remove the four screws at the fan sink retention module for microprocessor
one and set them in a safe place.
10. If the optional microprocessor board had not been installed, remove the six
screws at the location where it would be installed and set them in a safe place.
11. Remove the remaining screws that holding the system board to the chassis
and set them in a safe place.
12. While gently pushing in on the rear I/O panel from outside the chassis, slide
the system board toward the front of the chassis until the rear I/O panel is free
of the chassis.
13. Carefully lift the system board and extender out of the chassis.
Attention: When lifting the system board out of the chassis, make sure that
you provide support to the main system board and the extender board.
Chapter 4. Removing and replacing computer components
139