Acer Aspire 9420 Service Guide

61Chapter 3
Separating the LCD Module and Main Unit
1. Pull carefully and disconnect the LCD cable.
2. Tear off the tape securing the wireless antenna and pull out the wireless antenna.
3. Release the two screws securing the LCD hinges on the bottom side.
4. Release the two screws fastening the LCD hinges on the rear side.
5. Release the two screws holding the LCD hinges as shown.
6. Then separate the LCD module from the main unit. 

Chapter 362
Disassembling the Main Unit
Separating the Upper Case and the Lower Case
1. Release the connector lock and disconnect the touch pad FFC.
2. Release the connector lock and disconnect the function keyboard FFC.
3. Release the three screws securing the upper case.
4. Release the 27 screws holding the lower case.
5. Lift the upper case carefully and disconnect the lid switch cable.
6. Then separate the upper and the lower case. 

63Chapter 3
Removing the Function Keyboard
1. Release the FFC lock and disconnect the function keyboard FFC.
2. Release the four screws holding the function keyboard bracket.
3. Then remove the function keyboard bracket.
4. Carefully disconnect the microphone cable and remove the function keyboard. 

Chapter 364
Removing the Touch Pad Board
1. Carefully release the FFC lock and disconnect the touch pad board FFC.
2. There are 13 latches holding the touch pad bracket.
3. Unlock those latches with a screw driver as shown then detach the touch pad bracket.
4. Detach the touch pad board. 

65Chapter 3
Removing the ODD Module and Dummy Card
1. Slightly pull the ODD module and remove it.
2. Pull the dummy card from the slot and remove it.
Removing the Main Board
1. Disconnect the fan cable.
2. Disconnect the speaker cable and Bluetooth module cable.
3. Remove the four screws securing the main board.
4. Then detach the main board from the lower case. 

Chapter 366
Removing the System Fan
1. Release the two screws holding the heatsink.
2. Remove the heatsink.
Removing the Bluetooth Module
1. Detach the bluetooth module from the lower case.
2. Carefully disconnect the bluetooth module cable.
Removing the Speakers
1. Release the four screws securing the left and right speakers.
2. Remove the speakers from the lower case. 

67Chapter 3
Removing the MDC Module
1. Carefully disconnect the MDC cable.
2. Release the two screws securing the MDC board then detach the MDC board.
3. Disconnect the MDC board cable.
Remove the Heatsink Module
1. Release the five screws securing the heatsink.
2. Remove the heatsink module. 

Chapter 368
Removing the CPU
1. Release the screw counter clockwise with a flat screw driver.
2. Detach the CPU from the CPU socket.
LCD Disassembly
1. Remove the eight rubber caps on the LCD bezel and release the eight screws securing the LCD bezel.
2. Detach the LCD bezel from the LCD module as shown.
3. Release the screw holding the inverter board.
4. Disconnect the inverter board cables as shown and remove the inverter board. 

69Chapter 3
5. Release the four screws securing the LCD panel.
6. Detach the LCD panel carefully and reverse it as shown.
7. Tear off the tapes holding the LCD panel cable carefully then disconnect the LCD panel.
8. Remove the antenna from the LCD cover. 

Chapter 370
9. Release the four screws securing the left LCD bracket then remove the left LCD bracket.
10. Repeat the anterior step to remove the right LCD bracket.