Dell PowerEdge 1750 - Manual (Page 40)

7. Remove all external peripheral cables from their connectors at the back of the system.
8. Remove any installed PCI expansion cards. See " Removing an Expansion Card ."
9. Remove the PCI riser board assembly by pulling it straight up out of its connectors.
10. Remove the optional ROMB card and its backup battery, if they are installed. See " Removing a ROMB Card ."
11. Remove the optional RAC, if one is installed. See Figure 5 -3 for the location of the RAC connector ("EMBEDDED_REMOTE_ASSISTANT").
12. Remove the memory modules. See " Removing Memory Modules ."
13. Remove the microprocessor and heat sink assemblies. See " Removing a Microprocessor ."
14. Loosen the thumbscrew securing the system board to the chassis. See Figure 4 -22 .
Figure 4-22. System Board
15. Slide the system board toward the front of the chassis about 6.3 mm (0.25 inch).
16. Carefully lift the system board up and out of the chassis. Lift the board evenly, without twisting it. Take care not to catch or scrape the cables from the
control panel, the PDB, and the rear fan.
Installing the System Board
1. Lower the system board into the chassis, left side first to protect the PDB, control panel, and rear fan cables. Press the system board evenly onto all
the grounding tabs on the floor of the chassis.
2. Slide the system board toward the back of the chassis as far as it will go, about 6.3 mm (0.25 inch).
3. Tighten the thumbscrew to secure the system board.
4. Check to ensure that the system board jumpers are set to the same settings as the board you removed.
5. Install the microprocessor and heat-sink assemblies. See " Installing a Microprocessor ."
6. Install the memory modules. See " Installing Memory Modules ."
7. Install the optional RAC, if it was installed on the board you removed. See Figure 5 -3 for the location of the RAC connector; see the RAC documentation
for more information.
8. Install the optional ROMB card and its backup battery, if they were installed on the board you removed. See " Installing a ROMB Card ."
9. Press the PCI riser board assembly firmly into its connectors.
10. Install the PCI expansion cards. See " Installing an Expansion Card ."
11. Install the fan bracket assembly and connect the fans in the bracket to the system board. See " Installing the Fan Bracket ."
12. Connect the remaining cables to the system board:
l Power cable from rear fan to the FAN7 connector
l Power signal cable from the PDB to the PS_SIG connector
l Output power cable from the PDB to the PS_PWR connector
l Control panel cable to the FRONT_PANEL connector
l Any other cables you removed from the original board
13. Install the SCSI backplane board and any drives you removed or disconnected. See " Installing the SCSI Backplane Board ."
14. Connect the external peripheral cables to their connectors at the back of the system.
15. Carefully check for any cables or components not installed or improperly seated in their connectors on the system board.
16. Close the system covers. See " Closing the System Covers ."
17. Connect the power cable to the system and turn the system on.
18. Replace the optional front bezel, if applicable. See " Replacing the Bezel ."