Acer Aspire 7740 Service Guide

							Chapter 233
Remove HDD Password
This section teaches you how to remove HDD password:
Remove HDD Password:
•If you key in the wrong HDD password thrice, “HDD password error code” will appear on the 
screen. See the image below.
•If you need to solve HDD password locked problem, you can run HDD_PW.EXE
1.Key in “hdd_pw 15494 0”
2.Select “2”
3.Choose one of the uppercase strings
•Reboot the system and key in “0KJFN42” or “UVEIQ96” as your HDD user password. 
						

							34Chapter 2 
						

							Chapter 337
This chapter contains step-by-step procedures on how to disassemble the notebook computer for 
maintenance and troubleshooting.
Disassembly Requirements
To disassemble the computer, you need the following tools:
•Wrist grounding strap and conductive mat for preventing electrostatic discharge
•Flat screwdriver
•Philips screwdriver
•Hex screwdriver
•Plastic flat screwdriver
•Plastic tweezers
NOTE: The 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.
Chapter 3
Machine Disassembly and Replacement 
						

							38Chapter 3
General Information
Pre-disassembly Instructions
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.Place the system on a flat, stable surface. 
4.Remove the SD dummy card in the card reader card slot.
Disassembly Process
The disassembly process is divided into the following stages:
•External module disassembly
•Main unit disassembly
•LCD module disassembly
The flowcharts provided in the succeeding disassembly sections illustrate the entire disassembly sequence. 
Observe the order of the sequence to avoid damage to any of the hardware components. For example, if you 
want to remove the main board, you must first remove the keyboard, then disassemble the inside assembly 
frame in that order. 
Main Screw List
ItemScrewColorPart No.
A M2.5 x L6 Black 86.00E12.536
B M2.5 x L10 Black 86.00F84.73A
C M2.5 x L4 Black 86.00H59.734
D M2.5 x L3.5 Silver 86.9A563.3R5
E M2.5 x L5 Black 86.00F87.735
F M2 x L4 Silver 86.9A552.4R0
G M2 x L3 Silver 86.9A522.3R0
H M3 x L4 Silver 86.9A554.4R0 
						

							Chapter 339
External Module Disassembly Process
External Modules Disassembly Flowchart
The flowchart below gives you a graphic representation on the entire disassembly sequence and instructs you 
on the components that need to be removed during servicing. For example, if you want to remove the main 
board, you must first remove the keyboard, then disassemble the inside assembly frame in that order.
ItemScrewColorPart No.
A M2.5 x L6 Black 86.00E12.536
C M2.5 x L4 Black 86.00H59.734
F M2 x L4 Silver 86.9A552.4R0
G M2 x L3 Silver 86.9A522.3R0
H M3 x L4 Silver 86.9A554.4R0
EXTERNAL MODULE DISASSEMBLY
WLAN
BOARD TURN OFF POWER
AND PERIPHERALS
UNPLUG POWER
CABLES
F x 1
BACK
COVERCaptive Screwx4
DIMM
MODULES
REMOVE BATTERY
PA C K
SD DUMMY CARD
G x 1
ODD
MODULE
OPTICAL DISK
DRIVEOPTICAL
LOCKER
BRACKET
H x 2
HDD
MODULE
HARD DISK
BRACKETHARD DISK
DRIVE C x 1 Ax 1
Ax 4 
						

							40Chapter 3
Removing the Battery Pack
1.Turn base unit over. 
2.Slide the battery lock/unlock latch to the unlock position. 
3.Slide the battery release latch to the release position (1) to pop out the battery pack, then remove the 
battery pack from the main unit (2). 
 Note: Battery has been highlighted with the yellow circle as above image shows. Please detach the 
battery and follow local regulations for disposal. 
						

							Chapter 341
Removing the Optical Drive Module
1.See “Removing the Battery Pack” on page 40.
2.Remove the one screw (A) securing the optical drive module to the system.   
3.Slowly pull out the ODD module from the ODD drive bay.
Size (Quantity)ColorTo r q u ePart No.
M2.5 x L6 (1) Black 3.0 kgf-cm 86.00E12.536 
						

							42Chapter 3
4.Remove the one screw (G) securing the locker bracket and remove the locker bracket from the optical 
disk drive module.
Removing the Back Cover
1.See “Removing the Battery Pack” on page 40.
2.Release the four screws (A) and four captive screws securing the back cover. 
Size (Quantity)ColorTo r q u ePart No.
M2 x L3 (1) Silver 1.6 kgf-cm 86.9A522.3R0
Size (Quantity)ColorTo r q u ePart No.
M2.5 x L6 (4) Black 3.0 kgf-cm 86.00E12.536 
						

							Chapter 343
3.Pry loose and carefully lift and remove the back cover.
Removing the Hard Disk Drive Module
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Back Cover” on page 42.
3.Remove the one screw (C) securing the hard disk drive module to the system.    
Size (Quantity)ColorTo r q u ePart No. 
M2.5 x L4 (1) Black 3.0 kgf-cm 86.00H59.734 
						

							44Chapter 3
4.Lift the tab and slide the module away from the connector and remove it from the hard disk drive bay. 
NOTE: To prevent damage to device, avoid pressing down on it or placing heavy objects on top of it. 
5.Remove the two screws (H) securing the hard disk to the bracket and remove the hard disk from the 
bracket.         
Removing the Wireless LAN Card
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Back Cover” on page 42.
Size (Quantity)ColorTo r q u ePart No.
M3 x L4 (2) Silver 3.0 kgf-cm 86.9A554.4R0