Dell PowerEdge 6850 - Manual (Page 18)

Installing the System Board
1. Transfer the RAID memory and RAID key (if present), processors, VRMs, and jumpers to the new system board. See Figure A -3 in "Jumpers, Switches,
and Connectors" for the location of the system board connectors.
2. Install the new system board:
a. Lower the right side of the system board into the chassis.
b. Slowly lower the left side of the system board into the chassis.
c. Slightly lift up the front of the system board and maneuver the system board to the bottom of the chassis until it lays completely flat.
d. Ensure that all 17 retention hooks on the bottom of the chassis are inserted into the retention slots on the system board. See Figure C -9 .
e. Push the system board toward the back of the chassis until the blue retention pin snaps into place.
3. Install the RAID battery compartment:
a. Insert the two securing tabs on the battery compartment into the two securing slots on the side of the chassis. See Figure C -8 .
b. Press down the battery compartment to secure it.
4. For ease, connect the cables in the order listed below. See Figure A -3 and Figure A -5 in "Jumpers, Switches, and Connectors" for the locations of the
connectors on the system board and on the SCSI backplane, respectively.
l Power distribution harness to the power connectors on the corner of the system board
l Data interface cable from the system board BKPLN SIG connector to the SCSI backplane interface connector
l SCSI power cable to the SCSI backplane power connector
l RAID battery cable to the system board RAID BAT connector, if applicable
l Chassis intrusion switch cable to the system board intrusion switch connector
l SCSI A data cable from the system board SCSI_A connector to the SCSI A backplane connector
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
NOTE: Do not install the heat sinks/processor filler blanks at this time.
NOTE: Ensure that the SCSI backplane power cable from the power distribution board does not impede the system board as you lower the
system board into the chassis.
NOTE: Ensure that you attach the data interface cable and its cable clip to the fan-4 air guard. See Figure C -3 .
NOTE: Ensure that you insert the SCSI A cable into the retaining clip on the fan-3 air guard. See Figure C -3 .