Lenovo ThinkPad A30 2652 Hardware Maintenance Manual page 92

Removing and replacing a FRU
When installing: Some keyboard CRU insulators are not
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MT 2652/2653/2654
fixed with an adhesive tape and are
easily moved. For those insulators,
make sure that the keyboard CRU
insulator is placed as in following figure.
If the keyboard CRU insulator is not
placed firmly, the keyboard cannot be
installed properly.