Acer Aspire 9420 Service Guide

51Chapter 2
•The users can not change or remove password during resuming from S4.
•The max. number of times to retry the password is limited to three.
•Supervisor Password: Supervisor Password controls the access of the whole BIOS Setup Utility. If the 
Supervisor Password is set, the system will pop up the password dialog box to ask for the password when 
the users press  for entering BIOS Setup Utility. If the Supervisor Password is set and Password on 
boot is enabled, the system will pop up the...

Chapter 252
Boot
This menu allows the users to decide the order of bootable devices to load the operating system. It identifies all the 
bootable devices in the system and attempts to boot them in the order specified. Bootable devices include the 
diskette drive in module bay, the hard disk and the CD-ROM/DVD drive in module bay and onboard LAN device. 

53Chapter 2
Exit
•Exit Saving Changes: It allows the users to save changes to CMOS and reboot the system. 
•Exit Discarding Changes: The users can exit the Setup not to save changes.
•Load Setup Defaults: It allows the users to load default values in CMOS Setup.
•Discard Changes: The users can discard previous changes in CMOS Setup.
•Save Changes: The users can save current changes in CMOS Setup. 

Chapter 354
This chapter contains step-by-step procedures on how to disassemble the notebook for maintenance and 
troubleshooting.
To disassemble the computer, you need the tools below:
•Wrist ground strap and conductive mat for preventing electrostatic discharge
•Small Philips screw driver
•Flat head screw driver
•Hexagonal driver
•Tw e e z e r s
Note: The screws for the different components vary in size. During the disassembly process, group the 
screws with the corresponding components to avoid...

55Chapter 3
General Information
Before You Begin
Before proceeding with the disassembly procedure, you have to make sure that:
1. The system and all peripherals are powered off.
2. The AC adaptor and all power and signal cables from the system are unplugged.
3. The battery pack is removed.
Note: There are several types of screws used to secure the main unit. The screws vary in length. Please refer 
to the screws table after the flowchart. Group the same type of screws together during service...

Chapter 356
Disassembly Procedure Flowchart
The flowchart gives you a graphic representation on the entire disassembly and reassembly and instructs you how 
to remove the components.
No.DescriptionPart No.
a SCW HEX NYL I#R-40/O#4-40 L5.5   34.00015.081
b SCREW MACH WAFER M2*L4 NI        86.T39V1.002
c SCRW M2.5*6 ~ L-CASE + U-CASE    86.00D28.330
d SCRW M2*L3   86.00D29.620
e SCRW M2.5*5 WAFER B-ZN ROHS 86.00D47.630
f SCREW M2*L3 NYLOK CR 3+      86.00E25.723
g SCREW M2*L3 NON-NYLOK CR3+   86.00E31.723...

57Chapter 3
i SCREW M2.5*L8  NYLOK CR3+        86.00E34.738
j SCREW M2*L8  NI NON-NYLOK   86.00E35.228
k SCREW M3x4(86.9A524.4R0)    86.9A524.4R0
l SCRW M2*4 WAFER NI    86.9A552.4R0
m SCREW NI M2*6L       86.9A552.6R0
n SCRW M2.5*L3(NON NYLOK)   86.9A523.3R0
No.DescriptionPart No. 

Chapter 358
Disassembly Procedure
Removing the Battery Pack
1. Unlock the battery pack.
2. Slide the battery latch, hold it then remove the battery.
Removing the HDD Module
1. Release the three screws fastening the HDD module cover.
2. Detach the HDD module cover.
3. Release the two screws holding the HDD module then pull the HDD module as arrow indicates and remove the 
HDD module. 

59Chapter 3
Removing the MiniPCI Card and the Memory
1. Release the two screws securing the miniPCI cover.
2. Remove the miniPCI cover.
3. Disconnect the wireless antenna then remove the wireless LAN card.
4. Release the two screws securing the RAM cover and remove the RAM cover.
5. Press the left and right latches to pop up the memory.
Removing the Keyboard
1. Open the notebook as shown.
2. Remove the middle cover.
3. There are four latches securing the keyboard.
4. Push those latches by the screw...

Chapter 360
5. Remove the keyboard and reverse it.
6. Carefully pull the keyboard FFC lock, then disconnect the keyboard FFC.