Removal and replacement procedures  72 
5. 
Remove the access panel ("Access panel" on page 37). 
6.  Remove the air baffle ("Air baffle" on page 42). 
7.  Remove the PCI riser cages ("PCI riser cage" on page 57). 
8.  Disconnect all cables connected to the system board. 
9.  Remove all DIMMs ("DIMMs" on page 49). 
10.  If installed, remove the heatsink blank ("Heatsink blank" on page 50). 
11.  Remove the heatsink: 
a.  Loosen one pair of diagonally opposite screws halfway, and then loosen the other pair of screws. 
b.  Completely loosen all screws in the same sequence. 
c.  Remove the heatsink from the processor backplate. 
 
12.  Open each of the processor locking levers in the order indicated, and then open the processor retaining 
bracket.