Acer Aspire 7540 Service Guide

							Chapter 363
15.Carefully remove the LCD module from the base unit. 
NOTE: When connecting the cables back to the unit, please note that the cables should be routed well.
Separating the Upper Case from the Lower Case  
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the CPU” on page 54.
9.See “Removing the Optical Drive Module” on page 55.
10.See “Removing the Middle Cover” on page 58.
11 .See “Removing the Keyboard” on page 60.
12.See “Removing the LCD Module” on page 61.
13.Release the latch (a) and disconnect the fingerprint cable (b) from its connector on the main board. 
						

							64Chapter 3
14.Release the latch (a) and disconnect the touchpad cable (B) from its connector on the main board. 
15.Disconnect the left speaker cable from its connector on the main board. 
						

							Chapter 365
16.Remove the two screws (B) securing the upper case to the system.  
17.Remove the four screws (C) securing the upper case to the system.  
Size (Quantity)ColorTo r q u ePart No.
M2 x L4 (2) Silver 1.6 kgf-cm 86.9A552.4R0
Size (Quantity)ColorTo r q u ePart No.
M2.5 x L6 (4) Black 3.0 kgf-cm 86.00E12.536 
						

							66Chapter 3
18.Gently lift and detach the upper case from the lower case.
Removing the Fingerprint/Button and Touchpad Boards
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the CPU” on page 54.
9.See “Removing the Optical Drive Module” on page 55.
10.See “Removing the Middle Cover” on page 58.
11 .See “Removing the Keyboard” on page 60.
12.See “Removing the LCD Module” on page 61.
13.See “Separating the Upper Case from the Lower Case” on page 63.
14.Release the latch (a) and disconnect the fingerprint/ button cable (b) from the fingerprint/ button board.     
						

							Chapter 367
15.Detach the fingerprint/ button cable and touchpad cable from the upper case.
16.Release the latch (a) and disconnect the touchpad cable (b) from the touchpad board.  
17.Remove the two screws (B) securing the touchpad and fingerprint/button bracket to the upper case.           
Size (Quantity)ColorTo r q u ePart No.
M2 x L4 (2) Silver 1.6 kgf-cm 86.9A552.4R0 
						

							68Chapter 3
18.Lift and detach the touchpad and fingerprint/button bracket.
19.Detach the fingerprint/button board.
20.Pry to loosen the touchpad board and detach the touchpad board from the upper case.   
WARNING:  The touchpad board is glued to the upper case, only remove the touchpad board if it is defective.
 Note: Circuit boards > 10cm
2 has been highlighted with the yellow square as shown in the figure 
above. Please detach the circuit boards and follow the local regulations for disposal. 
						

							Chapter 369
Removing the USB Board Module
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the Optical Drive Module” on page 55.
9.See “Removing the CPU” on page 54.
10.See “Removing the Middle Cover” on page 58.
11 .See “Removing the Keyboard” on page 60.
12.See “Removing the LCD Module” on page 61.
13.See “Separating the Upper Case from the Lower Case” on page 63.
14.See “Removing the Fingerprint/Button and Touchpad Boards” on page 66.
15.Disconnect the USB cable from its connector on the main board and release the cable from the latches.    
						

							70Chapter 3
16.Remove the one screw (A) securing the USB board to the lower case.    
17.Remove the USB board module from the lower case.   
Size (Quantity)ColorTo r q u ePart No.
M2.5 x L4 (1) Black 3.0 kgf-cm 86.00H59.734 
						

							Chapter 371
Removing the Modem Board
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the CPU” on page 54.
9.See “Removing the Optical Drive Module” on page 55.
10.See “Removing the Middle Cover” on page 58.
11 .See “Removing the Keyboard” on page 60.
12.See “Removing the LCD Module” on page 61.
13.See “Separating the Upper Case from the Lower Case” on page 63.
14.See “Removing the Fingerprint/Button and Touchpad Boards” on page 66.
15.See “Removing the USB Board Module” on page 69.
16.Disconnect the modem cable from its connector on the main board.   
17.Remove the one screw (??) on the modem board and detach the modem board.    
						

							72Chapter 3
18.Remove the modem board module from the main board. 
Removing the Bluetooth Board
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the CPU” on page 54.
9.See “Removing the Optical Drive Module” on page 55.
10.See “Removing the Middle Cover” on page 58.
11 .See “Removing the Keyboard” on page 60.
12.See “Removing the LCD Module” on page 61.
13.See “Separating the Upper Case from the Lower Case” on page 63.
14.See “Removing the Fingerprint/Button and Touchpad Boards” on page 66.
15.See “Removing the USB Board Module” on page 69.
16.See “Removing the Modem Board” on page 71.