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2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-26 [CONFIDENTIAL] TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)
Table 2-4-1 Debug port (Boot mode) error status (2/9)
D port status Inspection items Details
Saving key scan code
Setting of TASK_1ms_TSC
FAN control
Initialization of sound
Clears mute
Sets the volume to max. (model controlling volume)
When request BIOS, EC/KBC
rewriting
Blinks green (cycle:2s, on:1s, off:1s)
When BIOS renewal is prohibited
Blinks orange (cycle: 8s(On:4s,Off:4s), beeps for
30s and holts (DPORT=F00BH))
When BIOS ROM is abnormal Blinks orange (cycle: 2s(On:1s,Off:1s))
Key input
Prohibition of USB
Beep
Waiting for key input
FDC reset
Setting parameters for 2HD(1.44MB)
Reading of first sector, If it is the data of 1.44MB
(2HD), the media type is definite.
Setting of parameters for 2DD (720KB)
Retrieval of “CHGBIOSA.EXE” from the root
directory.
Directory start header and calculates the sector
Read 1 sector of the root directory
Retrieval of entry of “CHGBIOSA.EXE”
/“CHGFIRMA.EXE” from the sector read.
Reading of EXE header of “CHGBIOSA.EXE” and
“CHGFIRMA.EXE” Key input when error occurred
F009
Reading CHGBIOSA.EXE /
CHGFIRMA.EXE
Execution of “CHGBIOSA.EXE” and
“CHGFIRMA.EXE”
Prohibition of cache
Permission of L1/L2 cache in Flash
ROM area
F100
Renewal of microcode