Other Failures | eMachines D720 instruction

•No hardware is listed under Other Devices.

13.If the Issue is still not resolved, see “Online Support Information” on page 161.

Other Failures

If the CRT Switch, Dock, LAN Port, external MIC or Speakers, PCI Express Card, 5-in-1 Card Reader or Volume Wheel fail, perform the following general steps to correct the problem. Do not replace a non-defective FRUs:

1.Check Drive whether is OK.

2.Check Test Fixture is ok.

3.Swap M/B to Try.

Chapter 4

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eMachines D720 manual Other Failures

Contents

EMachines D720/D520 Series Service Guide Revision History III Copyright Conventions Preface Page Table of Contents Viii 107 Model Definition and Configuration 142 Table of Contents Chapter Features Special keys and controls Power subsystemCommunication Privacy control System Block Diagram Icon Description Your Acer Notebook tourFront View Icon Description Latch Locks and releases the lid Closed Front ViewRear View HDD Left View Right View Bottom View Icon Function Description Indicators Function Left Button Right Button Main TouchPad TouchPad Basics with fingerprint reader Lock Keys and embedded numeric keypad Using the Keyboard Key Description Windows Keys Hotkey Icon Function Description Hot Keys US dollar sign Euro symbolSpecial Key Acer GridVista dual-display compatible Using the System Utilities ICH9-M Hardware Specifications and ConfigurationsProcessor Specification Memory Combinations Slot Total Memory System Memory SpecificationLAN Interface Specification Wireless Module 802.11b/g Specification Sata Hard Disk Drive Interface Specification8MB System Board Major Chips Controller Super-Multi Drive Module SpecificationAudio Interface Specification Keyboard Specification LCD Specification Battery Specification Navigating the Bios Utility Bios Setup Utility Parameter Description Information Parameter Description Format/Option Main IGD TV AdvancedParameter Description Submenu Items LAN IDE FER USBAspm URR Clear or Set Disabled orSecurity Parameter Description Option Removing a Password Setting a Password Changing a Password DTS PowerEmttm Acpi S3 IDE0 Hitachi HTS542516K9SA00 Boot Exit Saving Changes Exit Bios Flash Utilities USB HDD ABC USB Cdrom DOS Flash UtilityPage WinFlash Utility Remove HDD Password Remove HDD/BIOS Password Utilities Removing Bios Passwords Key in biospw 14452 Cleaning Bios Passwords Chapter Disassembly Requirements Machine Disassembly and Replacement Main Screw List Quantity Part Number Pre-disassembly InstructionsDisassembly Process General Information Screw List Step Quantity External Module Disassembly ProcessExternal Modules Disassembly Flowchart Removing the Battery Pack Step Size Quantity Screw Type Memory Cover M2.5*8 Removing the Lower CoversWlan HDD Remove the Wlan cover as shown Removing the Dimm Modules Step Size Quantity Screw Type Wlan Module M2*L3 Removing the Wlan Module Chapter Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Step Size Quantity Screw Type ODD Module M2.5*5 Removing the Optical Drive Module Step Size Quantity Screw Type ODD Bracket M2*L3 Main Unit Disassembly Process Step Size Quantity Screw Type Switch Cover M2.5*5 Removing the Switch Cover Chapter Removing the Keyboard Removing the Antenna Page Step Size Quantity Screw Type LCD Module M2.5*8 Removing the LCD Module Step Size Quantity Screw Type Step Size Quantity Screw Type Upper Cover M2.5*5 Removing the Upper CoverStep Size Quantity Screw Type Upper Cover M2.5*8 Disconnect a as shown Chapter Step Size Quantity Screw Type TouchPad Bracket M2*L3 Removing the TouchPad Bracket Chapter Removing the Speaker Modules Remove the Speaker Modules from the upper cover Removing the Power Board Step Size Quantity Screw Type Modem Module M2*L3 Removing the Modem Module Step Size Quantity Screw Type Mainboard M2.5*5 Removing the Main Board Chapter Step Size Quantity Screw Type Mainboard M2.5*4 Removing the CPU Fan Step Size Quantity Screw Type Thermal Module M2.5*6.5 Removing the Thermal Module Removing the CPU LCD Module Disassembly Process Step Size Quantity Screw Type LCD Bezel M2.5*5 Removing the LCD Bezel Step Size Quantity Screw Type Inverter Board M2.5*5 Removing the Inverter Board Step Size Quantity Screw Type Camera Module M2*L3 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*L3 Removing the LCD Brackets and FPC Cable Removing the Antennas Removing the MIC Module Replacing the LCD Panel LCD Module Reassembly ProcedurePage Chapter Page Replacing the LCD Bezel Replacing the Thermal Module Main Module Reassembly ProcedureReplacing the CPU Align the Fan Module on the screw brackets Replacing the CPU Fan ModuleReplacing the Mainboard Replacing the Modem Module Replacing the Power Board Replacing the Speaker Module Chapter Replacing the Upper Case Replacing the TouchPad Bracket Chapter Replacing the LCD Module Chapter Replacing the Antenna Cable Replacing the Keyboard Replacing the Switch Cover Replacing the ODD Module Place the HDD in the HDD carrier Replacing the Hard Disk Drive Module Insert the Wlan board into the Wlan socket Replacing the Wlan ModuleReplacing the Dimm Modules Replace the Memory Cover Replace the Wlan Cover Replacing the Lower Covers Replacing the Battery 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 Internal Microphone Failure Microphone ProblemsSelect Set up microphone Select Startup Repair HDD Not Operating CorrectlySelect Repair your computer ODD Not Operating Correctly ODD Failure Discs Do Not Play Drive Not Detected Modem Function Failure Wireless Function Failure External Mouse Failure Thermal Unit Failure Other Failures Dimm Intermittent ProblemsUndetermined Problems Code Description Post CodesSec Memory BDS & Specific action Each Driver entry point used in 80PORT Each Peim entry point used in 80PORT Smbios CF9RESETBootpriority Fvbservice Fwblockservice LegacybiosLegacybiosplatform Setuputility Each SmmDriver entry point used in 80PORT Top View Bottom View Hardware Open Gap Description 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 Description Acer P/N EMachines D720/D520 Exploded DiagramsMain Assembly LCD Panel EMachines D720/D520 FRU List Combo Drive Category Description Acer Part NoCPU/Processor Multi Drive Keyboard LCD Panel G 14.1 Wxga CMO N141I3-L02 Assy LCD Module 14.1 IN. Wxga Glare W/ANTENNA CCDLCD Panel G 14.1 Wxga AUO B141EW04 LCD Panel G 14.1 Wxga Samsung LTN141W3-L01-J Screw List Chapter 141 Model Country Acer Part No Description Appendix aEMachines D720/D520 Series China AAP TWN Gctwn Model Country Acer Part No Description CPU LCD Appendix a 148 571G12Mi 4KS 149 Appendix a 150 571G12Mi 4KS 151 Appendix a 152 Appendix B Test Compatible Components Microsoft Windows Vista Environment Test Mvpqs Vendor Type DescriptionCPU Test Intel Vendor Type Description HDD Test LAN Test ODD Test Vendor Type Description LCD TestModem Test Northbridge Chipset Test Wlan Test Southbridge Chipset Test 160 Appendix C Online Support Information 162 Index 164