Chapter 2
Upgrade Procedures for 1.3 GHz (A7158A) or 1.5 GHz (A7159A) Processors
Introduction
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unplugged from their sockets when you move the cable into place under the heatsink. 
See Figure 2-1, “Processor Cable Placed Correctly,” and Figure 2-2, “Processor Cable 
Placed Incorrectly.”
Figure 2-1 Processor Cable Placed Correctly
Figure 2-2 Processor Cable Placed Incorrectly
Step 3. Lock the assembly to the socket by rotating the cam on the socket 180 degrees clockwise, using a 
2.5 mm driver (Allen wrench).
CAUTION When rotating the locking cam, hold the palm of your hand on top of the assembly 
and exert light pressure. This ensures that the assembly stays flush and level to the 
socket while it is being tightened.
Cable is placed correctly and 
is under the heatsink
Sheet metal frame
Heatsink
Protective plastic sleeve
Cable is placed 
incorrectly and is pinched 
between the heatsink and 
the extender board frame
Sheet metal frame
Heatsink
Protective plastic sleeve