2 Troubleshooting Procedures 2.4 System Board Troubleshooting 2-20 [CONFIDENTIAL] Satellite A50S/TECRA A3X Maintenance Manual (960-534)
Table 2-3 D port status (2/9)D port
status
Inspection items Details
F007H BTBK_ENTER_SYSTEM_BIOS
Transition to System BIOS IRT
BIOS Rewite process
ICHM.D31 Initialization
DRAM Configuration
Permission of cache () Only for L1 cache
MEMORI CLEAR
F008H BTBK_INI_MEM_END
Transition to real moded, Copy BIOS in
RAM
F009H BTBK_CHG_RAM_BIOS
Storing key sc an code
Setting up TASK_1ms_T SC
F00AH BTBK_INI_VGA_END
Controlling Fan
Initializing sound systems (For beep
sound) Enabling system speaker
Canceling mute
Maximizing volume
When BIOS,EC/KBC is requested to be
rewritten (Green blinks in 2s cycle (ON:1s, Off: 1s))
F00BH BTBK_CANT_UPDATE_BIOS
Abnormal BIOS ROM (Orange blinks in 2s cycle (ON:1s, Off: 1s))
Key input Disabling USB first
Sound beep
Waiting for key input
Loading
CHGBIOSA.EXE/CHGFIRMA.EXE FDC RESET
Setting up the parameter for 2HD (1.44MB)
Loading first sector and Confirming the media
if it is 2HD (1.44MB)
Setting up the parameter for 2DD (720KB)
Searching CHGBIOSA.EXE from route directory
Calculate starting directory head, sector
Loading route directory per sector