Acer Aspire 7420 Service Guide

Chapter 393
23.Remove the four screws (C) holding the left and right speakers.    
24.Remove the left and right speakers from the upper case. 
Removing the USB Board
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.See “Removing the Lower Cover” on page 64.
5.See “Removing the Secondary HDD Cover” on page 65.
6.See “Removing the Secondary HDD Bracket and Connector” on page 66.
7.See “Removing the...

94Chapter 3
21.Remove the one screw (C) securing the USB board to the lower case.  
22.Remove the USB Board from the lower case. 
StepSize (Quantity)ColorTo r q u e
1 M2 x L4 (1) Silver 1.6 kgf-cm 

Chapter 395
 LCD Module Disassembly Process
LCD Module Disassembly Flowchart
Main Screw List
ItemScrewPart No.
A M2.5 x L6 86.00E33.736
E M2.5 x L5 86.00F19.735
F M2 x L3 86.00C07.220
LCD MODULE
LCD BEZEL
LEFT HINGERIGHT HINGE
Ax 8
Ex1 Ex 1
LCD ASSEMBLY
LEFT LCD
BRACKETFx2RIGHT LCD
BRACKETFx2LCD FPC
CABLE
INVERTER BOARD
LCD BACK PANEL
ANTENNAS
LCD MODULE DISASSEMBLY
Ax2
Ax1
VGA
CAMERAINTERNAL
MICROPHONE 

96Chapter 3
Removing the LCD Bezel
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.Remove the four upper bezel screw caps and the four lower bezel caps. 
7.Remove the eight screws (A) on the LCD module in the order as shown. 
StepSize (Quantity)ColorTo r q u e
1~8 M2.5 x L6 (8) Black 3.0 kgf-cm 

Chapter 397
8. Carefully pry open the LCD bezel and remove the bezel from the LCD module. 
NOTE: The bottom side of the bezel is glued to the lcd panel, be careful when trying to remove the bezel.
Removing the LCD module with the Brackets
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.See “Removing...

98Chapter 3
8.Remove the three screws (A) securing the LCD module and the Inverter panel. 
9.Detach the LCD with the brackets from the back cover. 
Removing the Inverter Board and FPC Cable
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.See “Removing the LCD Bezel” on page 96.
7.See “Removing the LCD...

Chapter 399
9.Detach the acetic tapes holding the FPC cable from the LCD panel and detach the acetic tape securing 
the FPC connector. 
10.Disconnect the FPC cable from the LCD panel. 
Removing the LCD Brackets
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.See “Removing the LCD Bezel” on page 96....

100Chapter 3
Removing the Left and Right Hinge
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.See “Removing the LCD Bezel” on page 96.
7.See “Removing the LCD module with the Brackets” on page 97.
8.Remove the two screws (E) securing the left and right hinge to the back cover.  
9.Remove the left and...

Chapter 3101
9.Loosen the aluminum tape holding the antennas in place.
10.Release the antenna cables from the latches. 
11 .Remove the tapes together with the antenna cables from the back cover.  
Removing the Internal Microphone and Web Camera
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Lower Cover” on page 64.
3.See “Removing the WLAN Board Modules” on page 68.
4.See “Removing the Middle Cover and the Power Board” on page 78.
5.See “Removing the LCD Module” on page 81.
6.See...

102Chapter 3
7.See “Removing the LCD module with the Brackets” on page 97.
8.See “Removing the Left and Right Hinge” on page 100.
9.See “Removing the Antennas” on page 100.
10.Remove the tape holding the internal microphone in place. 
11 .Remove the internal microphone from the back cover. 
12.Remove the Web camera from the back cover.