Toshiba TECRA S1 Maintenance Manual page 51

2 Troubleshooting
LED Status
(Hexadecimal)
0H
1H
2H
3H
4H
5H
6H
7H
8H
9H
AH
FH
C C H
99H
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
1C H
1D H
1EH
1FH
2-14
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Table 2-1 Printer port LED boot mode status (1/3)
Test Item
DIAG_SYSTEM_INIT
DIAG_A20_DISABLE
DIAG_INIT_CHIPSET
DIAG_TEST_RAM
DIAG_MOVE_BB_LOADER
DIAG_EXECUTE_IN_DRAM
DIAG_USER_FLASH_CHECK
DIAG_SHADOW_BIOS
DIAG_CHECKSUM_BIOS
DIAG_NORMAL_BOOT
DIAG_CRISIS_BOOT
DIAG_FATAL_ERROR
DIAG_CRISIS_BEGIN
DIAG_RESUME_RAM_ERROR
DEBUG_MISC_RESET
DEBUG_CS_FAST_A20_RESET
DEBUG_POST_SIGNAL_POR
DEBUG_CS_CHIP_INIT
DEBUG_OEM_ISA_VGA_SEARCH
DEBUG_HWIO_SETUP_CTC1
DEBUG_OEM_SET_CMOS_REGS
DEBUG_CS_MEMORY_SIZE
DEBUG_POST_TEST_RAM
DEBUG_GEN_TEST_ROMS
DEBUG_HWIO_RESET_INTS
DEBUG_VIDEO_VIDEO_INIT
DEBUG_VIDEO_EQUIP_INIT
DEBUG_VIDEO_COLOR_INIT
DEBUG_VIDEO_BW_INIT
DEBUG_HWIO_TEST_DMA_PAG
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Description
Boot started,read the cmos data for makesure
main board power is stable
Disable A20 through A20
Initialize ChipsetSet,load chipset default
size chache RAM
send patten for test the basic 640k RAM
Move boot load segment into the RAM
program execution from DRAM
Test print port for check
crisis option is enable or not
Decompress the system BIOS, and
Shadow System BIOS to RAM
Checksum System BIOS ROM
Jump to the reset point
Proceed with Crisis Boot,first initial
superio and boot device
Fatal Error,like the RAM error or ROM error
Start process the Crisis recovery procedure
Resume SMRAM not Found
Disable internal cache ram,and
reset cpu
Turn off FASTA20 for post,and check have keyboard
controllor
Initial PIC enable INT and Signal Power On Reset
Initialize the Chipset and hook PCI BIOS
Search For ISA Bus VGA Adapter, from address c000
to e000
Initialize Counter and Timer chip
User register config through CMOS
Size Memory, and detect memory timing,
setup memory controllor
Initialize and test the first 64k memory
checksum the system ROM
Reset PIC's status
Initialize Video Adapter(s),and check vga rom and
vga ram
Initialize Video (6845 Regs),set display mode
Initialize Color Adapter,and setup display reg.
Initialize Monochrome Adapter,and setup display
reg.
Send out some value,to test 8237A Page Registers
TECRA S1 Maintenance Manual
2.4 System Board