Acer Aspire 1820pt 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 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