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 the different components vary in size.  During the disassembly
process, group the screws with the corresponding components to avoid
mismatch when putting back the components.
4.1 General Information
4.1.1 Before You Begin
Before proceeding with the disassembly procedure, make sure that you do the following:
1.Turn off the power to the system and all peripherals.
2.Unplug the AC adapter and all power and signal cables from the system.
3.Press the battery compartment cover release button  and slide out the cover.
4.Pull out the battery pack using the pull loop at the end. 
						

							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 before pulling out the cables.
Do not force cables out of the connectors.
CONNECTORS WITH LOCKS· Unplugging the Cable
To unplug the cable, first unlock the connector by pulling up the two clasps on both sides of
the connector with a plastic stick.  Then carefully pull out the cable from the connector.
· Plugging the Cable
To plug the cable back, first make sure that the connector is unlocked, then plug the cable into
the connector.  With a plastic stick, press the two clasps on both sides of the connector to
secure the cables in place.Unplugging
the CablePlugging
the CablePlugging
the CableUnplugging
the Cable
Figure 4-2Using Connectors With LocksConnectors mentioned in the following procedures are assumed to be no-lock
connectors unless specified otherwise. 
						

							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 motherboard, you must first remove the keyboard, then disassemble the
inside assembly frame in that order.
Table 4-1Guide to Disassembly SequenceService ItemPrerequisiteRemove or replace the hard disk driveRemove or replace the internal moduleRemove the keyboard (and heat sink assembly).Remove the motherboard for service or replacement1.Remove the keyboard.
2.Disassemble the housing.Remove the touchpad1.Remove the keyboard.
2.Disassemble the housing.Replace the LCDRemove the display.Install CPURemove the keyboard (and heat sink assembly).Install additional memoryThe flowchart on the succeeding page gives a clearer and more graphic representation on the
entire disassembly sequence.  Please refer to it from time to time, together with the screw list
below.
SCREW LIST· A screwM2x4L Black(p/n: 86.1AI22.4R0)
· B screwM2x6L NI(p/n: 86.1A522.6R0)
· C screwM2x20L NI(p/n: 86.1A522.200)
· D screwM2.5x8L NYLOK B-ZN(p/n: 86.1A353.8R0)
· E screwM2.5x6L NYLOK  NI(p/n:86.1A553.6R0)
· F screwM3x6L BIND NI(p/n:86.4A524.6R0)
· G screwM2.5x4L C-ZN(p/n: 86.1A423.4R0)
· H screwM2x14L NI(p/n: 86.1A522.140)
· I screwM2x4L NI(p/n: 86.1A522.4R0)
· J screw capM2*L5 NI(p/n: 86.7A522.5R0) 
						

							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  E
x4  Fx3 Bx1 
Cx4   Dx8 Gx2Ix2
Ix3 
Jx1
Bx2 
Hx2      Ix4
Figure 4-3Disassembly Sequence Flowchart 
						

							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 insert the
module.  Push downward on each side of the memory module until it snaps in place.
To remove the memory module, release the slot locks found on both ends of the memory slot
to release the DIMM.  Then pull out the memory module. 
						

							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 administrator. 
						

							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 drive, reverse the steps described above.