Technical data

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9. Remove the memory modules from the system board, and place them on an antistatic surface.
10. Remove the processor module (for quad processor systems) or the P6 bus termination card (for
dual processor systems) from the MSMT353 or MSMT359 system board as described earlier in
this chapter.
11. Remove the eight screws securing the system board to the telescoping section.
12. Lift the system board out of the unit.
13. Install the new system board and secure it with the eight screws.
14. Attach the processor module or P6 bus termination card to the MSMT353 system board.
15. Install the memory modules on the system board.
16. Connect the internal cables to the system board. If you need help identifying cable connections,
refer to Chapter 5 for the MSMT353 or MSMT359 system board or Chapter 6 for the MSMT378
system board.
17. Secure the parallel and serial ports and audio jacks with the jackscrews.
18. Slide the telescoping section into the base unit. Ensure that all tabs engage correctly.
19. Install the five screws that secure the telescoping section to the base unit.
20. Install the riser card and option cards, and connect the internal SCSI cable to the riser card.
21. Reinstall the unit in the rack. Use a helper!
22. Close the base unit and reconnect the external cables.
Fans
Refer to Chapter 10, “Power Supply and Fans,” for details on fans.
NOTE Airflow in the system is front to back. Arrows on the fan indicate airflow direction and rotation.
Ensure that you install fans with arrows pointing to the back of the system.
Power Supply Fan
To replace the power supply fan:
1. Open the base unit.
2. Remove the power supply as described earlier in this chapter.
3. Disconnect the fan power cable.
4. Note the airflow direction of the fan, and then remove the four screws securing the fan to the
power supply housing.
5. Install the new fan on the power supply housing.
6. Reinstall the power supply and connect the fan power cable.
7. Close the base unit.