Acer Extensa 390 Service Guide

BIOS Setup Information3-11 3.6 Load Default Settings
When you select the Load Default Settings item from the main screen, a dialog box appears asking
you to confirm that you want to reset all settings to their factory defaults.
Load Setup Default Settings
Are you sure?
[Yes]                      [No]Choose Yes to confirm or No if otherwise. 

C  h  a  p  t  e  r        4 C  h  a  p  t  e  r        4
Disassembly and Unit ReplacementDisassembly and Unit Replacement4-1This chapter contains step-by-step procedures on how to disassemble the notebook computer for
maintenance and troubleshooting.
To disassemble the computer, you need the following tools:
· Wrist grounding strap and conductive mat for preventing electrostatic discharge
· Flat-bladed screwdriver
· Phillips screwdriver
· Hexagonal screwdriver
· Tweezers
· Plastic stickThe screws for...

4-2Service GuideFigure 4-1Removing the Battery PackRemoving all power sources from the system prevents accidental short circuit
during the disassembly process. 

Disassembly and Unit Replacement4-3 4.1.2 Connector Types
There are two kinds of connectors on the main board:
· Connectors with no locks
Unplug the cable by simply pulling out the cable from the connector.
· Connectors with locks
You can use a plastic stick to lock and unlock connectors with locks.The cables used here are special FPC (flexible printed-circuit) cables, which are
more delicate than normal plastic-enclosed cables.  Therefore, to prevent
damage, make sure that you unlock the connectors...

4-4Service Guide4.1.3 Disassembly Sequence
The disassembly procedure described in this manual is divided into four major sections:
· Section 4.2:Installing memory
· Section 4.3:Removing the modem board
· Section 4.4:Removing the hard disk drive
· Section 4.5:Removing the keyboard
· Section 4.6:Disassembling the inside frame assembly
· Section 4.7:Disassembling the display
The following table lists the components that need to be removed during servicing.  For example, if
you want to remove the...

Disassembly and Unit Replacement4-5BatteryModem 
ModuleDIMMHDDOpen  
Dimm DoorOpen  
Battery DoorRemove  
HDD CoverRemove  
Display HingeUnplug K/B 
conector Remove  
K/B  Remove 
LED Cover Remove 
Heat SinkRelease 
LatchesCPU 
Heat SinkLower CaseUnplug 
CablesCPU 
BoardUpper 
CaseKeyboard 
BoardRemove 
FDD/CD-ROMDC-DC 
Covert BdM/BAudio 
BoardSpeakerTouch 
PadPCMCIA 
SocketCharger 
BoardUnplug 
Inverter Cable Display 
Module Display 
Bazel Inverter 
Board Remove  
LED Cover  LCD 
Pannel   Ax3  Bx2  Dx4...

4-6Service Guide4.2 Installing Memory
Follow these steps to insert memory modules:
1.Turn off the computer.  Then turn the computer over to access its base.
2.Remove three screws from the memory door; then lift up and remove the memory door.Figure 4-4Removing the Memory Door
3.Remove the memory modules from its shipping container.
4.Align the connector edge of the memory module with the key in the connector.  Insert the edge
of the memory module board into the connector.  Use a rocking motion to fully...

Disassembly and Unit Replacement4-7Figure 4-5Installing and Removing Memory
5.Replace the memory door and secure it with the screws.Sleep Manager must be run after installing additional memory for the
computer to hibernate properly.  If Sleep Manager is active, it will
automatically adjust the hibernation file on your notebook.If you are using an operating system other than Windows 95 or DOS, you
may need to re-partition your hard disk drive to allow for the additional
memory.  Check with your system...

4-8Service Guide4.3 Removing the Modem Board
When you open the memory door, you can also access and replace the modem board.  See figure
below.Figure 4-6Removing the Modem Board 

Disassembly and Unit Replacement4-9 4.4 Removing the Hard Disk Drive
Follow these steps to remove the hard disk drive:
1.Turn the computer over and locate the hard disk drive bay cover.
2.Press the hard disk drive bay cover release and slide the cover out to remove it.  Set aside the
cover.
3.Pull the hard disk drive tab to remove the hard disk drive from the hard disk drive bay.Figure 4-7Removing the Hard Disk Drive
4.Store the hard disk drive in an antistatic bag.
If you want to install a new hard disk...