Attention: Each time an L3 module is installed on the system board, the LGA site where the module
connects with the system board must be cleaned. With the brush supplied with the replacement kit,
use only downward strokes, starting in the upper left corner. Move left to right, top to bottom, using
overlapping strokes. The brush must be discarded after cleaning four L3 sites.
Figure 3. Cleaning procedure for the LGA site
4. Remove the protective cover from the new L3 module. See Model 890 - L3 modules - remove the
protective cover.
Figure 4. Installing the L3 module
5. Each time an L3 module is installed on the system board, the associated interposer must be
inspected, using the magnifying glass provided in the system toolkit. The interposer is not acceptable
and the module must be returned if the following conditions occur.
v Figures 5. Shorts: If the button, a loop of the button wire, or an individual button wire lead
extends more than three times the width of the wire outside of a connector hole chamfer.
Analyze hardware problems 103
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