Acer Aspire One Model Ao751 Service Guide

Chapter 231
3.Reboot the system and key in the selected string (qjjg9vy, 07yqmjd etc.) for the BIOS user 
password. 

32Chapter 2 

Chapter 333
Machine Disassembly and Replacement
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
•Plastic flat screwdriver
•Plastic tweezers
NOTE: The screws for the different components vary in size. During the disassembly...

34Chapter 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 battery pack.
Disassembly Process
The disassembly process is divided into the following sections:
•Upper cover disassembly
•LCD module disassembly
•Main unit disassembly...

Chapter 335
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. Disassembly is divided into two tiers. Tier 1 
comprises of FRU parts that do not require complete disassembly of the computer. Tier 2 incorporates the 
remaining FRU parts that require complete disassembly.
Screw List
StepScrewQuantityColorPart No....

36Chapter 3
Removing the Battery Pack
1.Turn computer over. 
2.Slide the battery lock/unlock latch to the unlock position. 
3.Slide and hold the battery release latch to the release position (1), then slide out the battery pack from the main 
unit (2). 
12 

Chapter 337
Removing the 3G Cover
1.Remove the Battery Pack. See “Removing the Battery Pack” on page 36.
2.Loosen the ten captive screws from the Memory, HDD1, and HDD2 Covers.
3.Remove the two captive screws. 
4.Lift the 3G cover up to remove. 

38Chapter 3
Removing the Keyboard
1.Turn the computer rightside up and unlock the three (3) securing latches.
2.Grasp the keyboard and lift up to remove.
3.Lift the keyboard over and disconnect the keyboard FFC.
4.Remove the keyboard and place it on a clean surface.  

Chapter 339
Removing the Upper and Lower Covers
1.Remove the Battery Pack. See “Removing the Battery Pack” on page 36.
2.Turn the computer upside down. Remove the three securing screws under the battery pack.
3.Remove the two rubber foot pads and the eight securing screws.
4.Turn the computer rightside up and disconnect the TouchPad FFC.
StepSizeQuantityScrew Type
Upper Cover M2*3 (NL)
Red callout3
Upper Cover M2*5 (NL)
Green callout5 

40Chapter 3
5.Remove the five (5) securing screws.
6.Grasp the bottom of the upper cover and pry apart.
7.Lift the upper cover to remove completely.
StepSizeQuantityScrew Type
Upper Cover M2*5 (NL) 5