Dell PowerEdge 800 - Manual (Page 13)

2. Connect the chassis-intrusion switch cable to the INTRUSION_SWITCH connector on the system board. See Figure C -2 .
3. Insert the end of the fan cable into the routing hole in the expansion-card guide bracket.
4. Reinstall the front fan assembly.
Note the orientation of the fan assembly when installing it in the chassis. When the fan assembly is installed correctly, the fan faces toward the back of
the system and the blue plastic grill faces toward the front of the system. See
Figure C -2 .
5. Pull the fan cable through the routing hole in the expansion-card guide bracket.
6. Connect the fan cable to the FRONT_FAN connector on the system board. See Figure C -2 .
7. Close the system. See " Replacing the Cover " in "Troubleshooting Your System."
8. Lift the system upright.
9. Reinstall the bezel. See " Installing the Bezel " in "Troubleshooting Your System."
System Board
The system board and system board tray are removed and replaced as a single assembly.
Removing the System Board
1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2. Disconnect the cables to the I/O connectors on the back panel.
3. Remove the bezel. See " Removing the Bezel " in "Troubleshooting Your System."
4. Lay the system on its right side.
5. Remove the cover. See " Removing the Cover " in "Troubleshooting Your System."
6. Disconnect the two power cables from connectors PWR_CONN and 12V on the system board.
7. Remove the cooling shroud. See " Removing the Cooling Shroud " in "Installing System Components."
8. If the system has cabled SCSI drives or SATA drives, note the relative location of the interface cable connections between the system board and the
drives, so you can reconnect them in the proper sequence.
9. Disconnect the SCSI or SATA interface cable(s) connected to the system board or optional hard-drive controller card.
10. Disconnect the power cable(s) connected to the hard drives in the drive cage, or to the optional SCSI backplane.
11. Remove the screws securing the drive cage and remove the cage from the system. See Figure 7 -6 in "Installing Drives."
12. Disconnect all remaining cables attached to the connectors on the system board:
l Optical-drive interface cable (PRIMARY_IDE connector)
l Diskette-drive cable (FDD connector)
l Control panel cable (FRONT_PANEL connector)
l Chassis-intrusion switch cable (INTRUSION_SWITCH connector)
l Front fan cable (FRONT_FAN connector)
l Back fan cable (BACK_FAN connector)
l Any other cables attached to the system board, after recording their locations.
CAUTION: See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.
CAUTION: The processor heat sink can get hot during operation. To avoid burns, ensure that the system has sufficient time to cool before
removing the system board.