Acer 7740G manual Power-On Self-Test Post Error Message, Touchpad Check

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Check the Battery Pack

To check the battery pack, do the following:

From Software:

1.Check out the Power Management in control Panel.

2.In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total Battery Power Remaining are correct.

3.Repeat the steps 1 and 2, for both battery and adapter.

4.This helps you identify first the problem is on recharging or discharging.

From Hardware:

1.Power off the computer.

2.Remove the battery pack and measure the voltage between battery terminals 1(+) and 6(ground).

3.If the voltage is still less than 7.5 Vdc after recharging, replace the battery.

To check the battery charge operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

If the battery status indicator does not light up, remove the battery pack and let it return to room temperature. Re-install the battery pack.

If the charge indicator still does not light up, replace the battery pack. If the charge indicator still does not light up, replace the DC/DC charger board.

Touchpad Check

If the touchpad doesn’t work, do the following actions one at a time to correct the problem. Do not replace a non-defective FRU:

1.Reconnect the touchpad cables.

2.Replace the touchpad.

3.Replace the system board.

After you use the touchpad, the pointer drifts on the screen for a short time. This self-acting pointer movement can occur when a slight, steady pressure is applied to the touchpad pointer. This symptom is not a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

Power-On Self-Test (POST) Error Message

The POST error message index lists the error message and their possible causes. The most likely cause is listed first.

NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU.

This index can also help you determine the next possible FRU to be replaced when servicing a computer. If the symptom is not listed, see “Undetermined Problems” on page 104.

The following lists the error messages that the BIOS displays on the screen and the error symptoms classified by function.

NOTE: Most of the error messages occur during POST. Some of them display information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way it has been configured.

NOTE: If the system fails after you make changes in the BIOS Setup Utility menus, reset the computer, enter Setup and install Setup defaults or correct the error.

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Chapter 4

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Contents Aspire 7740 and 7740G Series Service Guide Revision History Copyright Procedures Gives precautionary measures toProblems Following conventions are used in this manualPreface Page Table of Contents FRU Field Replaceable Unit List 113 Chapter FeaturesBelow is a brief summary of the computer’s many features Aspect ratio 17.3 HD+ 1600 xIntegrated Acer Crystal Eye webcam 1024*768 800*600103-/104-/107-key keyboard Touchpad pointing device Environment System Block Diagram Your Acer Notebook tour Top ViewHotkeys Rear View Closed Front ViewRight View Indicates when the hard disk drive is active IndicatorsComputer has several easy-to-read status indicators Easy-Launch ButtonsF12 Using the KeyboardLock Keys and numeric keypad Open a text editor or word processor Chapter Windows KeysSpecial Key only for certain models Windows Mobility Center Using the System Utilities Acer GridVista dual-display compatibleChapter CPU Fan True Value Table Hardware Specifications and ConfigurationsProcessor System MemoryMemory Combinations Bluetooth InterfaceWireless Module 802.11b/g/n LAN ModuleVendor & model name Hard Disk DriveOptical Disc Drive US & US+ RW DVD Blu-Ray Disc DriveAudio Controller Realtek ALC669X DVD-RW Non Cprm & Cprm DVD+/-R Dual Blu-RayAudio Interface Yes/2.1 2W speakersSystem Board Major Chips BatteryVideo Memory KeyboardInput 100-240V~ 1.5A, 50-60Hz Output 19V, 65W/90W, 2-pin System Power ManagementAC Adaptor Chapter Bios Setup Utility System UtilitiesNavigating the Bios Utility Information Parameter DescriptionMain Parameter Description Format/OptionSecurity Clear or SetSetting a Password Page Boot Exit Bios Flash Utility Remove HDD Password Remove HDD PasswordThis section teaches you how to remove HDD password Chapter Machine Disassembly and Replacement Disassembly RequirementsGeneral Information Pre-disassembly InstructionsDisassembly Process Main Screw ListExternal Module Disassembly Process External Modules Disassembly FlowchartRemoving the Battery Pack Removing the Optical Drive Module Removing the Back Cover Removing the Hard Disk Drive Module Pry loose and carefully lift and remove the back coverRemoving the Wireless LAN Card M2 x L4 Silver Kgf-cm 86.9A552.4R0 Remove the wireless LAN card Removing the Dimm ModuleRemove the Dimm modules Chapter Main Unit Disassembly Process Removing the Heatsink Module Chapter Removing the CPU Chapter Removing the Middle Cover Removing the KeyboardChapter Removing the LCD Module Chapter Remove the four screws B from the left and right hinges Separating the Upper Case from the Lower Case Carefully remove the LCD module from the base unitPage Size Quantity Color Torque Removing the Touchpad and Button Boards Gently lift and detach the upper case from the lower caseChapter Page Size Quantity Color Torque Page Removing the Left Speaker Detach the touchpad board from the upper caseRemoving the USB Board Module Remove the left speaker from the upper boardM2.5 x L4 Black Kgf-cm 86.00H59.734 Chapter Remove the USB board module from the lower case Chapter Removing the Modem Board Removing the Bluetooth Module Removing the Microphone Page Removing the Main Board Remove the microphone from the systemPage Remove the one screw G securing the main board in place Removing the Right Speaker Remove the right speaker from the lower case LCD Module Disassembly Process Removing the LCD Bezel Removing the LCD panel with the Brackets Detach the webcam cable from the webcam module Page Removing the LCD Brackets Removing the FPC Cable Removing the Web Camera Page Removing the Antennas Symptoms Verified Go To Power-On Self-Test Post ErrorExternal Optical Disk Drive Check System Check ProceduresExternal Diskette Drive Check Keyboard or Auxiliary Input Device CheckPower System Check Memory CheckPower-On Self-Test Post Error Message Touchpad CheckIndex of Error Messages Error Code List Error Codes Error MessagesSystem board Extended RAM Failed at offset nnnn Error Message List Error Messages FRU/Action in SequenceSystem board System RAM Failed at offset nnnn System board DMA Test FailedFail-Safe Timer NMI Failed Fixed Disk n None Invalid System Configuration DataBlinking cursor shown on LCD during System board Phoenix Bios Beep Codes Code Beeps Post Routine DescriptionSetup Code Beeps Post Routine Description 100 Chapter Power-Related Symptoms Symptom / Error Action in Sequence Index of Symptom-to-FRU Error MessageLCD-Related Symptoms Symptom / Error Action in Sequence Speaker-Related Symptoms Symptom / Error Action in Sequence PCMCIA-Related Symptoms Symptom / Error Action in SequenceMemory-Related Symptoms Symptom / Error Action in Sequence Symptom / Error Action in SequencePage Modem-Related Symptoms Symptom / Error Action in Sequence Intermittent ProblemsUndetermined Problems Chapter 105 Code ConnectorMain Board Optical disk drive connector Heatsink fan cable connectorDC-in cable connector HDD1 connectorClearing Password Check and Bios Recovery Gap name in Aspire 7740/7740G Series is G29Bios Recovery by Crisis Disk Page 110 Chapter Page 112 Chapter FRU Field Replaceable Unit List Exploded Diagram Aspire 7740/7740G Series FRU List Aceraspire 7740 UMACBKJV70CP no LX.PLY02.025/44Cables CASE/COVER/BRACKET Combo Module Heatsink Keyboard Standard Black Texture Russian Mainboard Speaker 124 Chapter Appendix a Appendix a 125Aspire 7740/7740G Series Appendix a 126Appendix a 127 NBDCB4XS128 Appendix a Appendix a 129 130 Appendix a Appendix a 131 132 Appendix a Appendix a 133 134 Appendix a Appendix a 135 136 Appendix a Appendix a 137 138 Appendix a Appendix a 139 140 Appendix a Appendix a 141 142 Appendix a 143 Appendix a Appendix a 144 145 Appendix a Appendix a 146 Test Compatible Components Appendix BAccess Point Hardware Device TestsDevice name Vendor Wireless Printer Appendix B 149150 Online Support Information Appendix C152 Index LCD bezel removing 80 LCD Brackets removing
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