Acer Aspire 1420pt Service Guide

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...

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...

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...

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...

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...

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...

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...

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...

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...

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