Toshiba TECRA M9 Maintenance Manual page 71

2.4 System Board Troubleshooting
Table 2-5 Serial port (Boot mode) error status (2/9)
D port
Status
F0B9h Saving of key scan code
Setting of TASK_1ms_TSC
FAN control
Sound initialization (for BEEP sound)
When BIOS, EC/KBC rewriting is
requested
When BIOS ROM is abnormal
When BIOS renewal is prohibited
Key input
Reading of
CHGBIOSA.EXE/CHGFIRMA.EXE
TECRA M9 Maintenance Manual (960-631)
Test item
[CONFIDENTIAL]
2 Troubleshooting Procedures
Contents
System speaker permission
Cancel of sound mute
Setting of volume to max (model that can
control volume)
Blinks green (cycle:2s, on:1s, off:1s)
Blinks orange (cycle:2s, on:1s, off:1s)
Blinks orange (cycle:8s, on:4s, off:4s) HLT
after BEEP is sounded for 30s (LED=BBH))
Prohibition of USB
BEEP
Waiting for Key input
FDC RESET
Setting of 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.
Calculation of directory start head and
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
Execution of "CHGBIOSA.EXE" and
"CHGFIRMA.EXE"
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