Lenovo B590 Hardware Maintenance Manual page 78

Removal steps of speaker assembly and base cover
1
Remove the screws . Then remove the speaker assembly
Step Screw (quantity)
1
M2.5 × 5.7 mm, flat-head, nylon-coated (4)
Applying labels to the base cover
The new base cover is shipped with a kit containing labels of several kinds. Apply those labels listed when
you replace the base cover. For the labels which are not shipped with the new base cover, peel them off
from the old base cover, and adhere them to the new one.
Note: If you replace a part with the Windows Certificate of Authentication (COA) label
with the label attached to the customer. Otherwise, you can provide the customer with a letter, stating the
original location of the label on the computer and the information on the label, such as the part number,
serial number, and product key.
The following illustration shows the correct location of each label.
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Hardware Maintenance Manual
2
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Color
Black
Torque
4.0 kgf-cm
11 , return the old part