IBM IntelliStation A Pro 6217 Service Manual page 138

Figure 34. Removing the microprocessor board
10. Disconnect the microprocessor board from the system board by grasping the
122
IBM IntelliStation A Pro Type 6217: Problem Determination and Service Guide
1. Read the safety information that begins on page vii and "Installation guidelines"
on page 79.
2. Turn off the computer and attached devices; then, disconnect all power cords
and external cables.
3. Turn the computer on its side so that it is lying flat, with the cover facing up.
4. Remove the cover and support bracket (see "Removing the side cover" on
page 81 and "Removing the support bracket" on page 83).
5. Remove the air baffle.
6. Disconnect all cables from the microprocessor board.
7. Remove all DIMMs from the microprocessor board and set them in a safe,
static-protective place.
8. Remove the fan sink and microprocessor from the microprocessor board (see
"Removing the second microprocessor (microprocessor 2 and fan sink)" on
page 114) and set them in a safe, static-protective place.
Attention: Before attempting to remove the fan sink from the
microprocessor, be sure to read all the instructions at "Replacing the second
microprocessor (microprocessor 2 and fan sink)" on page 117.
9. Fully loosen the six captive screws connecting the microprocessor board to the
system board. Four of these screws also secure the fan sink retention module.
Alignment
holes
Alignment
pins
System
board
pull points on microprocessor board (at the two corners of the board nearest
microprocessor 1). This will free the board from the second-microprocessor
connectors and the two plastic alignment pins. The alignment pins will stay
with either the system board or the microprocessor board.
Option screws
(captive)
Microprocessor
board
Fan sink
retention module
Second-microprocessor
connectors