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Acer Aspire ZS600 Acer Aspire ZS600 Desktop Service Guide - Page 200

Checkpoints, Viewing BIOS checkpoints, Bootblock Initialization Code Checkpoints

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Checkpoints 0 A checkpoint is either a byte or word value output to I/O port 80h. The BIOS outputs checkpoints throughout bootblock and Power-On Self Test (POST) to indicate the task the system is currently executing. Checkpoint sare very useful in aiding software developers or technicians in debugging problems that occur during the pre- boot process. Viewing BIOS checkpoints 0 Viewing all checkpoints generated by the BIOS requires acheckpoint card, also referred to as a POST card or POST diagnostic card. These are ISA or PCI add-in cards that show the value of I/O port 80h on a LED display. Checkpoints may appear on the bottom right corner of the screen during POST. This display method islimited, since it only displays checkpoints that occur after the video card has been activated. Bootblock Initialization Code Checkpoints 0 The Bootblock initialization code sets up the chipset, memory, and other components before system memory is available. The following table describes the type of checkpoints that may occur during the bootblock initialization portion of the BIOS. NOTE: NOTE: Please note that 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. Table 4-2. Checkpoint Before D0 D0 D1 D2 D3 D4 4-6 Description If boot block debugger is enabled, CPU cache-as-RAM functionality is enabled at this point. Stack will be enabled from this point. Early Boot Strap Processor (BSP) initialization like microcode update, frequency and other CPU critical initialization. Early chipset initialization is done. Early super I/O initialization is done including RTC and keyboard controller. Serial port is enabled at this point if needed for debugging. NMI is disabled. Perform keyboard controller BAT test. Save power-on CPUID value in scratch CMOS. Go to flat mode with 4GB limit and GA20 enabled. Verify the boot block checksum. System will hang here if checksum is bad. Disable CACHE before memory detection. Execute full memory sizing module. If memory sizing module not executed, start memory refresh and do memory sizing in Boot block code. Do additional chipset initialization. Re-enable CACHE. Verify that flat mode is enabled. Test base 512KB memory. Adjust policies and cache first 8MB. Set stack. Troubleshooting

Section	Page
CHAPTER 1	5
Hardware Specifications	5
Chassis Specification 1-7	5
Motherboard Specification 1-10	5
CHAPTER 2	5
System Utilities	5
CHAPTER 3	5
System Disassembly and Assembly	5
CHAPTER 4	6
Troubleshooting	7
CHAPTER 5	7
Jumper and Connector Locations	7
CHAPTER 6	7
FRU List	7
AZ5770/AZ5771 Exploded Diagrams 6-4	7
FRU List 6-7	7
CHAPTER 1	9
Hardware Specifications	9
Chassis Specification 1-8	10
Motherboard Specification 1-11	10
Features	11
Quick Specification	11
Chassis Specification	16
Motherboard Specification	19
System Tour	24
M/B Placement	29
Jumper Setting	30
Block Diagram	32
CHAPTER 2	33
System Utilities	33
CMOS Setup Utility	35
Entering CMOS setup	36
Navigating Through the Setup Utility	36
BIOS Setup Utility	37
AMI UEFI BIOS Flash SOP for DOS	48
Flash Scenarios	48
Flash UEFI BIOS SOP for DOS	48
AMI UEFI BIOS Flash SOP for Windows	53
AMI UEFI BIOS Flash SOP for DOS with ME	56
AMI UEFI BIOS Flash SOP for SHELL	66
DMI Tool Utilities	70
LAN EEPROM Utilities	75
CHAPTER 3	77
System Disassembly and Assembly	77
Disassembly Process 3-6	78
Remove the Stand 3-8	78
Remove the ODD Bezel 3-10	78
Remove the Rear Cabinet 3-12	78
Remove the Motherboard Shielding 3-15	78
Remove the VESA Support Bracket 3-17	78
Remove the HDD Module 3-19	78
Remove the ODD Module 3-22	78
Remove the Speaker 3-25	78
Remove the OSD Board 3-33	78
Remove the VGA Card 3-35	78
Remove the CPU 3-42	78
Remove the Motherboard 3-43	78
Remove the Front Stand Bracket 3-46	78
Remove the WLAN Antenna Cables 3-51	78
Remove the Cushion Tape 3-53	78
Remove the Thermal Pads 3-54	78
Remove the LVDS Cable 3-55	78
Remove the Base Pan 3-56	78
Remove the Camera 3-58	78
Remove the Backlight Cable 3-59	78
Remove the IR Cable 3-60	78
Remove the Front Bezel 3-61	78
Reassembly Procedure 3-62	78
Replace the Backlight Cable 3-65	78
Replace the Camera 3-66	78
Replace the LVDS Cable 3-67	78
Replace the WLAN Antenna Cables 3-68	78
Replace the OSD Board 3-70	78
Replace the CPU Blower 3-71	79
Replace the Thermal Pads 3-72	79
Replace the Cushion Tape 3-73	79
Replace the Base Pan 3-74	79
Replace the Front Stand Bracket 3-76	79
Replace the CPU 3-81	79
Replace the Memory 3-85	79
Replace the Motherboard 3-86	79
Replace the VGA Bracket 3-87	79
Replace the WLAN Card 3-88	79
Replace the VGA Card 3-90	79
Replace the Convert Board 3-92	79
Replace the ODD Module 3-96	79
Replace the HDD Module 3-99	79
Replace the Heatsink 3-103	79
Replace the Speaker 3-105	79
Replace the VESA Support Bracket 3-109	79
Connect and route the cables 3-110	79
Replace the Motherboard Shielding 3-113	79
Replace the Rear Cabinet 3-115	79
Replace the ODD Bezel 3-116	79
Replace the Stand 3-118	79
Machine Disassembly and Replacement	81
Recommended Equipment	81
Replacement Requirements	81
Disassembly Process	82
Disassembly Flowchart	83
Remove the Stand	84
Remove the ODD Bezel	86
Remove the Rear Cabinet	88
Remove the Motherboard Shielding	91
Remove the VESA Support Bracket	93
Remove the HDD Module	95
Remove the ODD Module	98
Remove the Speaker	101
Remove the Heatsink	104
Remove the CPU Blower	106
Remove the Convert Board	107
Remove the OSD Board	109
Remove the VGA Card	111
Remove the VGA Bracket	113
Remove the WLAN Card	115
Remove the Memory	117
Remove the CPU	118
Remove the Motherboard	119
Remove the Front Stand Bracket	122
Remove the WLAN Antenna Cables	127
Remove the Cushion Tape	129
Remove the Thermal Pads	130
Remove the LVDS Cable	131
Remove the Base Pan	132
Remove the Camera	134
Remove the Backlight Cable	135
Remove the IR Cable	136
Remove the Front Bezel	137
Reassembly Procedure	138
Reassembly Flowchart	138
Replace the LCD Module	139
Replace the Backlight Cable	141
Replace the Camera	142
Replace the LVDS Cable	143
Replace the WLAN Antenna Cables	144
Replace the OSD Board	146
Replace the CPU Blower	147
Replace the Thermal Pads	148
Replace the Cushion Tape	149
Replace the Base Pan	150
Replace the Front Stand Bracket	152
Replace the CPU	157
Replace the Memory	161
Replace the Motherboard	162
Replace the VGA Bracket	163
Replace the WLAN Card	164
Replace the VGA Card	166
Replace the Convert Board	168
Replace the ODD Module	172
Replace the HDD Module	175
Replace the Heatsink	179
Replace the Speaker	181
Replace the VESA Support Bracket	185
Connect and route the cables	186
Replace the Motherboard Shielding	189
Replace the Rear Cabinet	191
Replace the ODD Bezel	192
Replace the Stand	194
CHAPTER 4	195
Troubleshooting	195
Introduction	197
Hardware Diagnostic Procedure	197
System Check Procedures	197
Power System Check	197
System External Inspection	197
System Internal Inspection	198
Beep Codes	199
Checkpoints	200
BIOS Recovery	202
Calibration SOP of control board	205
Debug Card information	216
Converter board setup	217
CHAPTER 5	219
Jumper and Connector Locations	219
Jumper Setting	223
Setting Jumper	223
CHAPTER 6	225
FRU List	225
AZS600_Pt Exploded Diagrams 6-4	226
FRU List 6-7	226
AZS600_Pt Exploded Diagrams	228

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