Toshiba Satellite A40 Maintenance Manual page 88

2.4 System Board Troubleshooting
LED Status
12h DISP_LOGO
13h INIT_SYS_MEM
14h EXE_MEM_CHECK
15h INIT_SYS_MEM
17h CHK_DMA_PAGE
18h CHECK_DMAC
19h INIT_DMAC
1Ah CHECK_PRT
1Bh CHECK_SIO
1Ch BOOT_PASSWORD
(In the case of "Reboot")
(In the case of "Boot ")
1Dh EX_IO_ROM_CHECK
1Eh PRE_BOOT_SETUP
Satellite A40 Maintenance Manual (960-458)
Table 2-5 Printer port LED status (7/8)
Test item
Initialization of conventional memory (Boot)
Check of exception in the protected mode
Initialization of conventional memory (Reboot)
Check of DMA Page Register (Boot)
Check of DMAC (Boot )
Initialization of DMAC (Boot )
Check of printer port existence
Check of SIO
Check of password
Check of option I/O ROM
Saving of value in 40:00h (for SIO saving/restoring)
Setting of font address for resume password
Setting of repeat parameter for USB KB
Final check of key input during IRT
Storing of T_SHADOW_RAM_SIZE
Update of system resource before boot
Rewriting of memory map data of INT15h E820h
function
Waiting for AC-Link initialization completion
2 Troubleshooting Procedures
Contents
Waiting for HDD initialization completion
Check of key input during IRT (waiting for KBC
initialization completion)
ATA priority initialization
BM loading process
Initialization of BM
Check of key input during IRT (waiting for KBC
initialization completion)
Input of password
BM open
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