2.4 System Board Troubleshooting

2 Troubleshooting Procedures

Table 2-5 Printer port LED status (7/8)

LED Status

Test item

Contents

 

 

 

12h

DISP_LOGO

 

 

 

 

13h

INIT_SYS_MEM

Initialization of conventional memory (Boot)

 

 

 

14h

EXE_MEM_CHECK

Check of exception in the protected mode

 

 

 

15h

INIT_SYS_MEM

Initialization of conventional memory (Reboot)

 

 

 

17h

CHK_DMA_PAGE

Check of DMA Page Register (Boot)

 

 

 

18h

CHECK_DMAC

Check of DMAC (Boot)

 

 

 

19h

INIT_DMAC

Initialization of DMAC (Boot)

 

 

 

1Ah

CHECK_PRT

Check of printer port existence

 

 

 

1Bh

CHECK_SIO

Check of SIO

 

 

 

1Ch

BOOT_PASSWORD

Check of password

 

 

 

 

(In the case of “Reboot”)

Waiting for HDD initialization completion

 

 

 

 

 

Check of key input during IRT (waiting for KBC

 

 

initialization completion)

 

 

 

 

 

ATA priority initialization

 

 

 

 

(In the case of “Boot”)

BM loading process

 

 

 

 

 

Initialization of BM

 

 

 

 

 

Check of key input during IRT (waiting for KBC

 

 

initialization completion)

 

 

Input of password

 

 

 

 

 

BM open

 

 

 

1Dh

EX_IO_ROM_CHECK

Check of option I/O ROM

 

 

 

1Eh

PRE_BOOT_SETUP

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

 

 

 

Satellite A40 Maintenance Manual (960-458)

2-29

Page 85
Image 85
Toshiba A40 manual Displogo, Initsysmem, Exememcheck, Chkdmapage, Checkdmac, Initdmac, Checkprt, Checksio, Bootpassword