240  |   Installing System Components 
 
 
 
20  Remove the screws that secure the lower middle plane to the chassis. 
Figure 3-74. 
21  Lift the lower middle plane out of the chassis. See Figure 3-74. 
Figure 3-74.   Removing and Installing the Lower Middle Plane 
Installing the Middle Planes 
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. 
1  Place the lower middle plane into the chassis. See Figure 3-74. 
2  Replace the screws that secure the lower middle plane to the chassis. 
See Figure 3-74. 
3  Connect all the cables to the lower middle plane. 
You must route these cables properly on the chassis to prevent them 
from being pinched or crimped.