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Troubleshooting
4-7
Bootblock Recovery Code Checkpoints
0
The Bootblock recovery code gets control when the BIOS determines that a BIOS recovery
needs to occur because the user has forced the update or the BIOS checksum is corrupt. The
following table describes the type of checkpoints that may occur during the Bootblock
recovery portion of the BIOS.
NOTE:
NOTE
:
Checkpoints may differ between different platforms based on system configuration.
Checkpoints may change due to vendor requirements, system chipset or option ROMs
from add-in PCI devices
D5
Bootblock code is copied from ROM to lower system memory and control
is given to it. BIOS now executes out of RAM. Copies compressed boot
block code to memory in right segments. Copies BIOS from ROM to RAM
for faster access. Performs main BIOS checksum and updates recovery
status accordingly.
D6
Both key sequence and OEM specific method is checked to determine if
BIOSrecovery is forced. Main BIOS checksum is tested. If BIOS
recovery is necessary,control flows to checkpoint E0. See Bootblock
Recovery Code Checkpoints sectionfor more information.
D7
Restore CPUID value back into register. The Bootblock-Runtime
interface module is moved to system memory and control is given to it.
Determine whether to execute serial flash.
D8
The Runtime module is uncompressed into memory. CPUID information
is stored in memory.
D9
Store the Uncompressed pointer for future use in PMM. Copying Main
BIOS into memory. Leaves all RAM below 1MB Read-Write including
E000 and F000 shadow areas but closing SMRAM.
DA
Restore CPUID value back into register. Give control to BIOS POST
(ExecutePOSTKernel).See POST Code Checkpoints section of document
for more information.
DC
System is waking from ACPI S3 state.
E1-E8 ECEE
OEM memory detection/configuration error. This range is reserved for
chipset vendors & system manufacturers. The error associated with this
value may be different from one platform to the next.
Table 4-2.
Checkpoint
Description
Summary of Contents for Veriton Z4621G
Page 1: ...Acer VZ4620G VZ4621G SERVICEGUIDE ...
Page 2: ...ii ...
Page 6: ...vi ...
Page 7: ...vii ...
Page 8: ...viii ...
Page 9: ...CHAPTER 1 Hardware Specifications ...
Page 28: ...1 20 Hardware Specifications and Configurations M B Placement 0 ...
Page 30: ...1 22 Hardware Specifications and Configurations Internal header pin definition 0 ...
Page 31: ...Hardware Specifications and Configurations 1 23 Block Diagram 0 ...
Page 32: ...1 24 Hardware Specifications and Configurations ...
Page 33: ...CHAPTER 2 System Utilities ...
Page 50: ...2 18 System Utilities 8 Flash BIOS is finished ...
Page 54: ...2 22 System Utilities 10 Flash BIOS is finished ...
Page 63: ...System Utilities 2 31 12 Select Yes and press Enter key 13 Flash BIOS is finished ...
Page 66: ...2 34 System Utilities 11 Select Yes and press Enter key 12 Flash BIOS is finished ...
Page 69: ...System Utilities 2 37 ...
Page 73: ...System Utilities 2 41 ...
Page 74: ...2 42 System Utilities ...
Page 75: ...CHAPTER 3 System Disassembly and Assembly ...
Page 78: ...3 4 ...
Page 86: ...3 12 System Disassembly and Assembly First open one top side then open the other top side ...
Page 87: ...System Disassembly and Assembly 3 13 Open the low side ...
Page 96: ...3 22 System Disassembly and Assembly Removing the Display Card 0 ...
Page 113: ...System Disassembly and Assembly 3 39 ...
Page 121: ...System Disassembly and Assembly 3 47 Unplug the LCD power cable Take out the LCD with bracket ...
Page 131: ...System Disassembly and Assembly 3 57 Lock all the latch Plug the LVDS cable ...
Page 141: ...System Disassembly and Assembly 3 67 Close the CPU bracket cover ...
Page 147: ...System Disassembly and Assembly 3 73 Lock 2 VGA locks ...
Page 153: ...System Disassembly and Assembly 3 79 Attach the mylar to cover the camera ...
Page 160: ...3 86 System Disassembly and Assembly 4 Attach the mylar as the location shown in the picture ...
Page 164: ...3 90 System Disassembly and Assembly N A 4 Table 3 45 ID Size Quantity Screw Type ...
Page 170: ...3 96 System Disassembly and Assembly Install the hinge cover ...
Page 171: ...System Disassembly and Assembly 3 97 Thermal Pad location on base pan 0 ...
Page 174: ...3 100 System Disassembly and Assembly ...
Page 175: ...CHAPTER 4 Troubleshooting ...
Page 190: ...4 16 Troubleshooting Pressing the 25 calibration points in proper hole by using the stylus ...
Page 194: ...4 20 Troubleshooting ...
Page 195: ...CHAPTER 5 Jumper and Connector Locations ...
Page 196: ...5 2 Jumper Setting 5 4 Setting Jumper 5 4 ...
Page 197: ...Jumper and Connector Locations 5 3 Jumper and Connector Locations ...
Page 200: ...5 6 Jumper and Connector Locations ...
Page 201: ...CHAPTER 6 FRU List ...
Page 202: ...6 2 VZ4620G VZ4621G Exploded Diagrams 6 4 FRU List 6 7 ...
Page 204: ...6 4 FRU Field Replaceable Unit List VZ4620G VZ4621G Exploded Diagrams 0 Main Exploded Diagram ...