Dell PowerEdge 1900 Systems Owner's Manual page 103

Remove the SAS RAID controller daughter card from the expansion-bay bracket and set aside
b
for later reinstallation.
11 If a RAC card is present in the system, disconnect the RAC cables from the system board. Leave the
RAC card attached to the expansion-bay bracket.
Squeeze the metal tabs on the ends of the RAC cable connector and gently work the connector out of
the socket.
12 Remove the expansion-bay bracket:
Pull inward on the latch on the left side of the bracket along the system chassis wall while
a
pulling upward on the plunger at the rear of the system.
Pull the bracket slightly forward to free the bracket from the chassis tabs and lift the bracket up
b
and out of the chassis.
13 Remove the TOE key, if present. See Figure 6-2.
14 Disconnect all cables from the connectors on the front edge of the system board.
CAUTION:
The DIMMs are hot to the touch for some time after the system has been powered down. Allow time
for the DIMMs to cool before handling them. Handle the DIMMs by the card edges and avoid touching the DIMM
components.
15 Remove the memory modules. See "Removing Memory Modules" on page 88.
16 Remove the processor(s). See "Replacing a Processor" on page 91.
17 To remove the system board:
Lift up the retention pin and grasp the front end of the system board tray. Slide the system
a
board toward the front of the system disengaging the board from the hooks on the chassis. See
Figure 3-28.
Slide the board toward the back of the system, then tilt the left side of the board upward and
b
use the system board handles to lift the system board out of the system chassis. See Figure 3-28.
Installing System Components
103