Acer AO756 Service Manual page 127

Remove the 15 screws securing the upper and lower case.
2.
Open the notebook lid to its maximum angle.
3.
From top to bottom, pry the right side of the upper case to release the latches.
4.
Service and Maintenance
Figure 5:40. Removing the Upper and Lower Case Screws
Figure 5:41. Removing the Upper Case (1 of 3)
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