DELL 650 User Manual

Replacing the System and Backplane Board Assemblies

5

Figure 1-2.

Separating the System/Backplane Board Assembly

22

Remove the power cable from the power connector on the system board. See Figure 1-2.

23

Release the plastic cable tie that secures the cable connector to connector U3 and remove the 
free end of the power cable from the backplane board (connector U3).

24

Pull the backplane board away from the system board. See Figure 1-2.

Installing the System/Backplane Board Assembly

 

CAUTION: 

See your System Information Guide for complete information about safety precautions, 

working inside the computer, and protecting against electrostatic discharge.

 

NOTE: 

It is not necessary to remove the hard drives or the CD/diskette drive from the system during this 

procedure.

To install the system board/backplane board assembly, perform the following steps:

1

Connect the four-conductor power cable to the back of the backplane (connector U3). Secure 
this connector with a plastic cable tie to the backplane.

2

Connect the system board to the backplane board. See Figure 1-2.

 

NOTICE: 

Use a screw only in the center screw hole to secure the system board/backplane board to the 

chassis.

3

Using one of the three Phillips screws removed in step 21 of the board removal procedure, 
secure the system board/backplane board to the chassis using the center screw hole (see 
Figure 1-3). Discard the other two screws.

system board

screws (3)

shroud

backplane board

power cable