Troubleshooting
4-27
0x1A
Initialize DMA command register with these settings:
1. Memory to memory disabled
2. Channel 0 hold address disabled
3. Controller enabled
4. Normal timing
5. Fixed priority
6. Late write selection
7. DREQ sense active
8. DACK sense active low. Initialize
LBT
Core
0x22
Reset the keyboard.
LBT
Core
0x40
Test A20 line
LBT
Core
0x67
Quick initialization of all Application Processors in a
multiprocessor system
LBT
Core
0x32
Compute CPU speed.
LBT
Core
0x69
Initialize the handler for SMM.
LBT
Core
0x6B
If CMOS is bad, load Custom Defaults from flash into
CMOS. If successful, reboot.
LBT
Core
0x3C
If CMOS is valid, load chipset registers with values from
CMOS, otherwise load defaults and display Setup prompt.
If Auto Configuration is enabled, always load the chipset
registers with the Setup defaults (Rel 6.0).
LBT
Core
0x3D
Load alternate registers with CMOS values.
LBT
Core
0x42
Initialize interrupt vectors 0 thru 77h
LBT
Core
0x46
Verify the ROM copyright notice.
LBT
Core
0x45
Initialize all motherboard devices.
LBT
Core
0x49
1. Size the PCI bus topology and set bridge bus numbers.
2. Set the system max bus number.
3. Write a 0 to the command register of every PCI device.
4. Write a 0 to all 6 base registers in every PCI device.
5. Write a -1 to the status register of every PC
LBT
Core
0xC6
Initialize note dock
LBT
Core
0xC5
PnPnd dual CMOS (optional)
LBT
Core
0x48
Verify that the equipment specified in the CMOS matches
the hardware currently installed. If the monitor type is set
to 00 then a video ROM must exist. If the monitor type is 1
or 2 set the video switch to CGA. If monitor type 3, set the
video switch to m
LBT
Core
0xD1
Initialize BIOS stack
LBT
Core
0xD3
Setup E820h and WAD memory map
LBT
Core
Table 4-4.
POST Codes
POST Code
Function
Phase
Component
Summary of Contents for Aspire 4743Z
Page 1: ...Aspire 4743 4743G 4743Z 4743ZG SERVICEGUIDE...
Page 10: ...10...
Page 11: ...CHAPTER 1 Hardware Specifications...
Page 14: ...1 4...
Page 50: ...1 40 Hardware Specifications and Configurations...
Page 51: ...CHAPTER 2 System Utilities...
Page 70: ...2 20 System Utilities...
Page 71: ...CHAPTER 3 Machine Maintenance...
Page 74: ...3 4...
Page 82: ...3 12 Machine Maintenance 4 Lift the base door to remove Figure 3 9 Base Door...
Page 85: ...Machine Maintenance 3 15 6 Detach the bracket from the HDD Figure 3 14 HDD Bracket...
Page 87: ...Machine Maintenance 3 17 4 Pull the WLAN module out of the slot Figure 3 17 WLAN Module...
Page 100: ...3 30 Machine Maintenance 6 Lift the speakers from the upper cover Figure 3 40 Speaker Cable...
Page 106: ...3 36 Machine Maintenance 4 Lift the USB board from the lower cover Figure 3 50 USB Board...
Page 174: ...3 104 Machine Maintenance...
Page 175: ...CHAPTER 4 Troubleshooting...
Page 207: ...CHAPTER 5 Jumper and Connector Locations...
Page 215: ...CHAPTER 6 FRU List...
Page 216: ...6 2 Aspire 4743 4743G 4743Z 4743ZG Exploded Diagrams 6 4 Main Assembly 6 4 LCD Assembly 6 5...
Page 234: ...6 20 FRU List...
Page 235: ...CHAPTER 7 Model Definition and Configuration...
Page 236: ...7 2 Aspire 4743 4743G 4743Z 4743ZG 7 3...
Page 270: ...7 36 Model Definition and Configuration...
Page 338: ...7 104 Model Definition and Configuration...
Page 339: ...CHAPTER 8 Test Compatible Components...
Page 340: ...8 2 Microsoft Windows 7 Environment Test 8 4...
Page 351: ...CHAPTER 9 Online Support Information...
Page 352: ...9 2 Introduction 9 3...
Page 354: ...9 4 Online Support Information...