Acer Aspire 8940 Service Guide

Chapter 391
5.Open the locking latch on the FFC and disconnect it from the TouchPad Board.
6.Remove the FFC from the Upper Cover as shown.
7.Remove the two screws securing the TouchPad Board in place.
StepSizeQuantityScrew Type
Finger Print 
ReaderM2*3 2 

92Chapter 3
8.Lift the board clear of the Upper Cover. 

Chapter 393
Removing the RTC Battery
IMPORTANT: Follow local regulations for disposal of all batteries.
1.See “Removing the Upper Cover” on page 77.
2.To replace the battery, pry the existing battery out of the Mainboard and press a replacement down firmly in to 
the socket. 

94Chapter 3
Removing the Bluetooth Board
1.See “Removing the Upper Cover” on page 77.
2.Disconnect the Bluetooth cable from the Mainboard.
3.Disconnect the Bluetooth cable from the Bluetooth Board.
4.Remove the single screw securing the Bluetooth Board to the Lower Cover.
StepSizeQuantityScrew Type
Bluetooth Board M2*3 1 

Chapter 395
5.Remove the Bluetooth Board from the Lower Cover. 

96Chapter 3
Removing the USB Board
IMPORTANT: The USB FFC is supplied as part of the Lower Cover. If the USB FFC is defective, replace the entire 
Lower Cover.
1.See “Removing the Upper Cover” on page 77.
2.Open the locking latch on the FFC and disconnect it from the Mainboard.
3.Open the locking latch on the FFC and disconnect it from the USB Board. 

Chapter 397
4.Remove the single screw securing the USB Board to the Lower Cover.
5.Remove the USB Board from the Lower Cover as shown.
IMPORTANT: The USB FFC is supplied as part of the Lower Cover. If the USB FFC is defective, replace the entire 
Lower Cover.
StepSizeQuantityScrew Type
USB Board M2.5*4 1 

98Chapter 3
Removing the Power Saving Board
1.See “Removing the Upper Cover” on page 77.
2.Remove the single securing screw from the board.
3.Remove the board from the chassis.
StepSizeQuantityScrew Type
Power Saving 
BoardM2.5*4 1 

Chapter 399
Removing the Mainboard
1.See “Removing the Hinge Supports” on page 105.
2.Disconnect the Speaker and Subwoofer cables from the Mainboard.
3.Remove the three screws securing the Mainboard to the Lower Cover.
StepSizeQuantityScrew Type
Mainboard M2.5*4 3 

100Chapter 3
4.Pivot the Mainboard upward and remove it from the chassis, right side first. Place the Mainboard on a clean, 
dust-free surface.