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Acer Aspire 1420pt Service Guide

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    							Chapter 4151
    8.Remove and recently installed hardware or software.
    9.Restore system and file settings from a known good date using System Restore. 
    If the issue is not fixed, repeat the preceding steps and select an earlier time and date.
    10.Reinstall the Operating System.
    11 .If the Issue is still not resolved, see “Online Support Information” on page 165.
    Internal Microphone Failure
    If the internal Microphone fails, perform the following actions one at a time to correct the problem. Do not 
    replace non-defective FRUs:
    Microphone Problems
    If internal or external Microphones do no operate correctly, perform the following actions one at a time to 
    correct the problem.
    1.Check that the microphone is enabled. Navigate to Start´ Control Panel´ Hardware and Sound´ 
    Sound and select the Recording tab.
    2.Right-click on the Recording tab and select Show Disabled Devices (clear by default). 
    3.The microphone appears on the Recording tab. 
    4.Right-click on the microphone and select Enable.
    5.Select the microphone then click Properties. Select the Levels tab.
    6.Increase the volume to the maximum setting and click OK.
    7.Test the microphone hardware:
    a.Select the microphone and click Configure.
    b.Select Set up microphone.
    Start
    Check M/B Mic . 
    cable Re-assemble the 
    MIC cable to M/B
    OK
    NG
    Check MIC wire 
    of LCD module
    OK
    Swap MIC wire of 
    LCD module 
    OK
    NG
    Swap M/B
    Start
    Check M/B Mic . 
    cable Re-assemble the 
    MIC cable to M/B
    OK
    NG
    Check MIC wire 
    of LCD module
    OK
    Swap MIC wire of 
    LCD module 
    OK
    NG
    Swap M/B 
    						
    							152Chapter 4
    c.Select the microphone type from the list and click Next.
    d.Follow the onscreen prompts to complete the test.
    8.If the Issue is still not resolved, see “Online Support Information” on page 165.
    HDD Not Operating Correctly
    If the HDD does not operate correctly, perform the following actions one at a time to correct the problem. 
    1.Disconnect all external devices.
    2.Run a complete virus scan using up-to-date software to ensure the computer is virus free. 
    3.Run the Windows 7 Startup Repair Utility:
    a.insert the Windows 7 Operating System DVD in the ODD and restart the computer. 
    b.When prompted, press any key to start to the operating system DVD. 
    c.The Install Windows screen displays. Click Next. 
    d.Select Repair your computer. 
    e.The System Recovery Options screen displays. Click Next. 
    f.Select the appropriate operating system, and click Next. 
    NOTE: Click Load Drivers if controller drives are required. 
    g.Select Startup Repair. 
    h.Startup Repair attempts to locate and resolve issues with the computer.
    i.When complete, click Finish. 
    If an issue is discovered, follow the onscreen information to resolve the problem.
    4.Run the Windows Memory Diagnostic Tool. For more information see Windows Help and Support.
    5.Restart the computer and press F2 to enter the BIOS Utility. Check the BIOS settings are correct and that 
    CD/DVD drive is set as the first boot device on the Boot menu.
    6.Ensure all cables and jumpers on the HDD and ODD are set correctly.
    7.Remove any recently added hardware and associated software.
    8.Run the Windows Disk Defragmenter. For more information see Windows Help and Support.
    9.Run Windows Check Disk by entering chkdsk /r from a command prompt. For more information see 
    Windows Help and Support.
    10.Restore system and file settings from a known good date using System Restore. 
    If the issue is not fixed, repeat the preceding steps and select an earlier time and date.
    11 .Replace the HDD. See “Disassembly Process” on page 34. 
    						
    							Chapter 4153
    USB Failure (Right up/down side)
    If the rightside USB port fails, perform the following actions one at a time to correct the problem. Do not 
    replace non-defective FRUs:
    Other Failures
    If the VGA board, 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 non-defective FRUs:
    1.Check whether the drive is OK.
    2.Verify that the Test Fixture is ok.
    3.Swap the main board and retest.
    Start
    Check USB/B to 
    M/B cable Re-assemble the 
    USB/B cable to M/B
    OK
    NG
    Check USB/B
    OK
    Swap USB/B and 
    USB cable 
    OK
    NG
    Swap M/B
    Start
    Check USB/B to 
    M/B cable Re-assemble the 
    USB/B cable to M/B
    OK
    NG
    Check USB/B
    OK
    Swap USB/B and 
    USB cable 
    OK
    NG
    Swap M/B 
    						
    							154Chapter 4
    Intermittent Problems
    Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
    hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
    should be considered only when a recurring problem exists.
    When analyzing an intermittent problem, do the following:
    1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
    2.If no error is detected, do not replace any FRU.
    3.If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors. 
    Undetermined Problems
    The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
    whether a short circuit is suspected, or whether the system is inoperative. 
    Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
    NOTE: Verify that all attached devices are supported by the computer.
    NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power On 
    Issue” on page 144.):
    1.Power-off the computer.
    2.Visually check them for damage. If any problems are found, replace the FRU.
    3.Remove or disconnect all of the following devices:
    • Non-Acer devices
    • Printer, mouse, and other external devices
    •Battery pack
    • Hard disk drive
    •DIMM 
    • CD-ROM/Diskette drive Module
    • PC Cards
    4.Power-on the computer.
    5.Determine if the problem has changed.
    6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
    7.If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
    • System board
    • LCD assembly 
    						
    							Chapter 4155
    Post Codes
    These tables describe the Post Codes and components of the POST process.
    Sec:
    NO_EVICTION_MODE_DEBUG   EQU        1 (CommonPlatform\sec\Ia32\SecCore.inc)
    Memory:
    DEBUG_BIOS   EQU   1 (Chipset\Alviso\MemoryInitAsm\IA32\IMEMORY.INC)
    0x
    C2MTRR setup
    0x
    C3Enable cache
    0x
    C4Establish cache tags
    0x
    C5Enter NEM, Place the BSP in No Fill mode, set CR0.CD = 1, CR0.NW = 0.
    0xCFCache Init Finished
    0x
    A0First memory check point
    0x
    01Enable MCHBAR
    0x
    02Check for DRAM initialization interrupt and reset fail
    0x
    03Verify all DIMMs are DDR or DDR2 and unbuffered
    0x
    04Detect an improper warm reset and handle
    0x
    05Detect if ECC SO-DIMMs are present in the system
    0x
    06Verify all DIMMs are single or double sided and not asymmetric
    0x
    07Verify all DIMMs are x8 or x16 width
    0x
    08Find a common CAS latency between the DIMMS and the MCH
    0x
    09Determine the memory frequency and CAS latency to program
    0x
    10Determine the smallest common TRAS for all DIMMs
    0x
    11Determine the smallest common TRP for all DIMMs
    0x
    12Determine the smallest common TRCD for all DIMMs
    0x
    13Determine the smallest refresh period for all DIMMs 
    						
    							156Chapter 4
    0x
    14Verify burst length of 8 is supported by all DIMMs
    0x
    15Determine the smallest tWR supported by all DIMMs
    0x
    16Determine DIMM size parameters
    0x
    17Program the correct system memory frequency
    0x
    18Determine and set the mode of operation for the memory channels
    0x
    19Program clock crossing registers
    0x
    20Disable Fast Dispatch
    0x
    21Program the DRAM Row Attributes and DRAM Row Boundary registers
    0x
    22Program the DRAM Bank Architecture register
    0x
    23Program the DRAM Timing & and DRAM Control registers
    0x
    24Program ODT
    0x
    25Perform steps required before memory init
    0x
    26Program the receive enable reference timing control register
    Program the DLL Timing Control Registers, RCOMP settings
    0x
    27Enable DRAM Channel I/O Buffers
    0x
    28Enable all clocks on populated rows
    0x
    29Perform JEDEC memory initialization for all memory rows
    0x
    30
    0x
    31Perform steps required after memory init
    Program DRAM throttling and throttling event registers
    0x
    32Setup DRAM control register for normal operation and enable
    0x
    33Enable RCOMP
    0x
    34Clear DRAM initialization bit in the SB
    0x
    35Initialization Sequence Completed, program graphic clocks
    0x
    AFDisable access to the XMM registers 
    						
    							Chapter 4157
    BDS & Specific action:
    0x0
    0Report the legacy boot is happening
    0x1
    2Wake up the APs
    0x1
    3Initialize SMM Private Data and relocate BSP SMBASE
    0x2
    1
    0x2
    7PC init begin at the stage1
    Report every memory range do the hard ware ECC init
    0x2
    8Report status code of every memory range
    0x5
    0Get the root bridge handle
    0x5
    1Notify pci bus driver starts to program the resource
    0x5
    8Reset the host controller
    0x5AIdeBus begin initialization
    0x7
    0Simple Text Output Protocol Functions(VGA class reset)
    0x7
    1Report that VGA Class driver is being disabled
    0x7
    2Report that VGA Class driver is being enabled
    0x7
    8Terminal Console In reset and Console Out reset
    0x7
    9Report that the remote terminal is being disabled
    0x7AReport that the remote terminal is being enabled
    0x9
    0Keyboard reset
    0x9
    1USB Keyboard disable
    0x9
    2Keyboard detection
    0x9
    3Report that the usb keyboard is being enabled
    0x9
    4Clear the keyboard buffer
    0x9
    5Init Keyboard
    0x9
    8Mouse reset 
    						
    							158Chapter 4
    Each PEIM entry point used in 80_PORT
    0x9
    9
    0x9AMouse disable
    Detect PS2 mouse
    0x9BReport that the mouse is being enabled
    0xB8Peripheral removable media reset(ex:IsaFloppy, USB device)
    0xB9Peripheral removable media disable
    0xBBPeripheral removable media enable
    0xE
    4Report Status Code here for DXE_ENTRY_POINT once it is available
    0xF
    8Report that ExitBootServices() has been called
    0xF
    9Runtime driver set virtual address map
    0x
    00
    0x
    01PEI_EVENT_LOG
    0x
    02PEI_OEM_SERVICE
    0x
    03PEI_SIO_INIT
    0x
    04PEI_MONO_STATUS_CODE
    0x
    05PEI_CPU_IO_PCI_CFG
    0x
    06PEI_CPU_IO
    0x
    07PEI_PCI_CFG
    0x
    08PEI_CPU_PEIM
    0x
    09PEI_PLATFORM_STAGE1
    0x0APEI_VARIABLE
    0x0B
    0x0CPEI_SB_INIT
    PEI_CAPSULE
    0x0DPEI_PLATFORM_STAGE2
    0x0
    EPEI_SB_SMBUS_ARP_DISABLED
    0x
    0FPEI_HOST_TO_SYSTEM
    0x
    10PEI_MEMORY_INIT 
    						
    							Chapter 4159
    Each Driver entry point used in 80_PORT
    0x
    11PEI_S3_RESUME
    0x
    12PEI_CLOCK_GEN
    0x
    13PEI_OP_PRESENCE
    0x
    14PEI_TPM_TCG
    0x
    15PEI_FIND_FV
    0x
    16PEI_H2O_DEBUG_IO
    0x
    17PEI_H2O_DEBUG_COMM
    0x
    18PEI_SMM_CONTROL
    0x19~0x1FPEI_RESERVED
    0x20~0x2EPEI_OEM_DEFINED
    0x2FPEI_DXE_IPL
    0x
    30RESERVED
    0x
    31DXE_CRC32_SECTION_EXTRACT
    0x
    32SCRIPT_SAVE
    0x
    33ACPI_S3_SAVE
    0x
    34SMART_TIMER
    0x
    35JPEG_DECODER
    0x
    36PCX_DECODER
    0x
    37HT_CPU / MP_CPU
    0x
    38LEGACY_METRONOME
    0x
    39FTWLITE
    0x3ARUN_RIME
    0x3BMONOTONIC_COUNTER
    0x3CWATCH_DOG_TIMER 
    						
    							160Chapter 4
    0x3DSECURITY_STUB
    0x3
    EDXE_CPU_IO
    0x
    3FCF9_RESET
    0x
    40PC_RTC
    0x
    41
    STATUS_CODE
    0x
    42VARIABLE
    0x
    43EMU_VARIABLE
    0x
    44DXE_CHIPSET_INIT
    0x
    45DXE_ALERT_FORMAT
    0x
    46PCI_HOST_BRIDGE
    0x
    47PCI_EXPRESS
    0x
    48DXE_SB_INIT
    0x
    49IDE_CONTROLLER
    0x4A
    0x4BSATA_CONTROLLER
    SB_SM_BUS
    0x4CISA_ACPI_DRIVER
    0x4DISA_BUS
    0x4
    EISA_SERIAL
    0x
    4FIDE_BUS
    0x
    50PCI_BUS
    0x
    51BOOT_PRIORITY
    0x
    52FVB_SERVICE
    0x
    53ACPI_PLATFORM
    0x
    54PCI_HOT_PLUG
    0x
    55DXE_PLATFORM 
    						
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