26
2. Remove the primary processor and the secondary processor (if installed). See the “To
replace the processor module” procedure above for details.
3. Disconnect the fan power cable from J10, which is located near the top left of the
secondary processor slot on the system board.
4. Remove the four screws securing the grille and fan to the chassis.
5. Gently pull the fan right until the motor housing contacts the DPRM.
6. Gently pull the fan downward until the fan housing clears the chassis and remove the fan.
7. Note the airflow direction of the fan and the position of the fan cable.
8. Ensure the airflow direction arrow on the new fan is pointing in the correct direction, then
place the new fan at an angle inside the chassis.
9. Grasp the fan with one hand and use the other to slightly pull the left side of the DPRM
toward the right so that the fan slips into place.
10. Place the grille on the outside, align the mounting holes, and install the four screws. Do
not overtighten.
11. Connect the fan power cable to J10.
12. Install the processor module(s).
13. Install the power supply, swing it back into the chassis, and secure it with the plungers.
To replace the bottom system fan:
1. Remove the face panel. See the “Case Components” section above for details.
2. Remove the expansion cards. See the “Expansion Cards” section above for details.
3. Remove the two screws that secure the right card guide to the chassis.
4. Lift the card guide up to disengage the mounting tabs, and remove it from the chassis.
5. Disconnect the fan power cable from J54, which is located near the battery on the front
edge of the system board.
6. Note the airflow direction of the fan.
7. Remove the four screws securing the fan to the front of the chassis and remove the fan.
8. Ensure that the airflow direction arrow on the new fan is pointing in the correct direction
and place the fan inside the chassis.
9. Align the mounting holes, and install the four screws. Do not overtighten.
10. Connect the fan power cable to J54.
11. Insert the card guide tabs into the slots and push the card guide down until the tabs
engage.
12. Install the two screws that secure the card guide to the chassis.
