Step Size Quantity Screw Type Mainboard M2.5*5 | Acer 5251, 5551G

4.Remove the one (1) securing screw from the Mainboard.

Step		Size	Quantity	Screw Type

Mainboard	M2.5*5		1

5.Place a dust free, protective mat on the lcd screen to aid in the removal of the mainboard.

Chapter 3

77

Image 87

Acer 5251, 5551G manual Step Size Quantity Screw Type Mainboard M2.5*5

Contents

Aspire 5251/5551G/5551 Series Service Guide Revision History III Copyright Conventions Preface Page Table of Contents Viii Troubleshooting 137 Aspire Aspire 5551GMicrosoft Windows 7 Environment Test Table of Contents Chapter Features Optical Media Drive Storage SubsystemAudio Storage Privacy control Dimensions and weightPower subsystem Communication Environment Optional Items ATI SB820M System Block Diagram HDD Your Acer Notebook tourFront View Icon Description Closed Front View Left ViewHdmi Right View Indicators Bottom ViewIcon Function Description Function Left Button Right Button Main TouchPad TouchPad Basics Using the Keyboard Lock Keys and embedded numeric keypadLock key Description Key Description Windows Keys Hotkey Icon Function Description Hot Keys CPU Hardware Specifications and ConfigurationsPlatform Specification Processor Specifications Fan Acoustic Specifications Operation Application Loudness Sone Tone Mode DBAODD 0MB System Memory Specification4GB Memory Combinations Slot Total Memory SANYO/SONY/PANASONIC/SAMSUNG/SIMPLO AS2009A Onboard LAN SpecificationWireless LAN Specification Battery Specification Cell System Power Management Acpi mode Specification Power and Keyboard Controller SpecificationHard Disk Drive Interface Specification Super-Multi Drive Module VGA Chip Specification LCD Display Resolutions Aspire Aspire 5551GVGA LCD Specification LvdsOhci Card Reader Specification Audio Interface Specification Chapter Navigating the Bios Utility Bios Setup Utility Uuid Aspire 5251/5551G/5551 BiosInformation Parameter Description Disabled MainParameter Description Format/Option Clear Disabled orSecurity Parameter Description Option Removing a Password Setting a Password Continue Changing a Password USB CD/DVD ROM Boot Exit Exit Saving Changes Exit Bios Flash Utilities USB CD/DVD DOS Flash UtilityPage WinFlash Utility UnlockHD Remove HDD/BIOS Password UtilitiesRemove HDD Password Password Cleaning Bios Passwords Removing Bios Passwords Using Boot Sequence Selector Using DMITools InputOutput Using the LAN MAC Eeprom Utility Chapter Disassembly Requirements Machine Disassembly and Replacement Pre-disassembly Instructions Main Screw List Quantity Part Number Disassembly Process External Module Disassembly Process External Modules Disassembly FlowchartScrew List Step Quantity Removing the Battery Pack Removing the SD Dummy Card Step Size Quantity Screw Type ODD Module M2.5*8 Removing the Optical Drive Module Step Size Quantity Screw Type ODD Bracket M2*3 Step Size Quantity Screw Type Logic lower door M2.5*8 Removing the Logic Lower Door Step Size Quantity Screw Type 3G Cover M2*3 Removing the 3G Cover Removing the Dimm Module Step Size Quantity Screw Type Wlan Module M2*3 Removing the Wlan Module Detach the Wlan Board from the Wlan socket Chapter Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Main Unit Disassembly Flowchart Main Unit Disassembly Process Removing the Keyboard Chapter Step Size Quantity Screw Type Removing the Upper Cover Chapter Release the locking latch on a Disconnect a as shown Step Size Quantity Screw Type Upper Cover M2.5*5 Removing the Left Speaker Module Lift the Speaker clear of the Upper Cover Removing the Right Speaker Module Lift the Right Speaker Module clear of the device Step Size Quantity Screw Type Power board M2*3 Removing the Power Board Removing the TouchPad Bracket Step Size Quantity Screw Type TouchPad Bracket M2*3 Step Size Quantity Screw Type Card Reader M2*3 Removing the Card Reader Board Removing the USB Board Lift the USB board clear of the device Removing the Bluetooth Board Removing the Mainboard Step Size Quantity Screw Type Mainboard M2.5*5 Chapter Page Disconnect the Bluetooth to mainboard cable Removing the Thermal Module Step Size Quantity Screw Type Thermal Module M2.5*3.2GPU Carefully lift the Thermal Module clear of the Mainboard Removing the CPU LCD Module Disassembly Flowchart LCD Module Disassembly Process Removing the LCD Assembly Chapter Step Size Quantity Screw Type LCD assembly M2.5*5 Step Size Quantity Screw Type LCD Bezel M2.5*6 Removing the LCD Bezel Removing the Camera Module Step Size Quantity Screw Type LCD Panel M2.5*5 Removing the LCD Panel Step Size Quantity Screw Type LCD Brackets M2*3 Removing the LCD Brackets and Lvds Cable Chapter Disconnect the Lvds cable from the panel Chapter Removing the Microphone Cable Page Removing the Antennas Page Replacing the Antennas LCD Module Reassembly ProcedurePage Replacing the Microphone Cable Replacing the LCD Brackets and Lvds Cable 102 Chapter Replacing the LCD Panel Place the Camera in the module Connect the camera cable Replacing the Camera Module Replacing the LCD Bezel Replacing the LCD Assembly Page 108 Chapter Replacing the CPU Main Module Reassembly Procedure Replacing the Thermal Module Connect the fan cable Chapter 111 Replacing the Mainboard Page 114 Chapter Replacing the Bluetooth Board Replacing the USB Board Page Replacing the Card Reader Board Replacing the TouchPad Bracket 120 Chapter Replacing the Power Board Replacing the Right Speaker Module Replacing the Left Speaker Module Replacing the Upper Cover Page 126 Chapter Replacing the Keyboard Replacing the Hard Disk Drive Module Replacing the Wlan Module Replacing the Dimm Modules Replacing the 3G Cover Replacing the Logic Lower Door Replacing the ODD Module Replacing the SD Dummy Card Replacing the Battery 136 Chapter Symptoms Verified Go To Common Problems Computer Shutsdown Intermittently Power On Issue No Post or Video No Display Issue Abnormal Video Display Random Loss of Bios Settings Built-In Keyboard Failure LCD Failure Internal Speaker Failure TouchPad Failure Sound Problems Microphone ProblemsSelect Set up microphone HDD Not Operating Correctly Select Repair your computerSelect Startup Repair ODD Not Operating Correctly ODD Failure Discs Do Not Play Drive Not Detected Thermal Unit Failure Wireless Function Failure Other Failures External Mouse Failure Intermittent Problems Undetermined ProblemsDimm Post Codes Post Code Range Phase Peirecoveryloadfiledone PEI Peienterrecoverymode PEIPeirecoverymediafound PEI Peirecoverymedianotfound PEI Bdsenterbootmanager BDS Bdsenumerateallbootoption BDSBdsendofbootselection BDS Bdsentersetup BDS Smmacpidisableend SMM Smmacpienablestart SMMSmmacpienableend SMM Smmacpidisablestart SMM Top View JODD1 PJP2JHDD1 PJP1 USB/B Board Power Board For NEW85 Wlan LED CR/B Board Clear Cmos Jumper Clearing Password Check and Bios RecoveryClearing Password Check Steps for Clearing Bios Password Check Steps for Bios Recovery from USB Storage Bios Recovery by Crisis DiskBios Recovery Boot Block Bios Recovery Hotkey FRU Field Replaceable Unit List Aspire 5251/5551G/5551 Exploded Diagrams Main AssemblyDescription Acer P/N Base Assembly LED Assembly Antenna Wlan MainAntenna Wlan AUX Aspire 5251/5551G/5551 FRU List Screw List Chapter 167 Aspire Appendix a Media Extra SW1 Card Reader Wireless Processor Memory ChipModel Acer Part No Memory AAP Aspire 5551GEmea China TWN Gctwn VGA Chip Madisonpr 1G-DDR3 SO2GBIII10Wxgag Wxgag DDR3 Parkxt 2GB HDD 1GB AS5551G LX.PUU01.003 N320GB5.4 N832G32Mn LX.PUU01.001 AS5551G LX.PUS01.003 NBDCB4 AS5551G LX.PUS02.014 EME Acla AS5551 LX.PTQ02.021 UMA SO2GBIII13B UMA SO2GBIII10 UMA SO1GBIII10 Ksbr SO1GBIII13 AS5551 LX.PTQ02.016 AS5551 LX.PWK02.002 McAfee 1-Build 3rd WiFi N332G32Mn 2x2 BGN Appendix a 186 Appendix B Test Compatible Components Battery Microsoft Windows 7 Environment TestVendor Type Description Adapter Vendor Type Description Toshiba Digi MK3265GSX Sata 8MB LF F/WGJ002J N15.6WXGAGNLED15.6WXGAG SO1GBIII13BR InnoluxNLED15.6WXGAGB Kingston NB Chipset Audio Codec Vendor Type Description WiFi AntennaBluetooth Wireless LAN 23707801 3rd WiFi BG Foxconn Wirelss LAN Atheros HB95BG HM Appendix C Online Support Information 196 Index Removing 72, 73, 75 199 200