Toshiba Tecra M5 Maintenance Manual page 76

2 Troubleshooting Procedures
Table 2-5 Printer port LED boot mode status (2/9)
LED Status
B9h 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 renewal is prohibited
When BIOS ROM is abnormal
Key input
Reading of
CHGBIOSA.EXE/CHGFIRMA.EXE
2-22
Test item
[CONFIDENTIAL]
2.4 System Board Troubleshooting
Contents
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:8s, on:4s, off:4s) HLT
after BEEP is sounded for 30s (LED=BBH))
Blinks orange (cycle:2s, on:1s, off:1s)
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"
TECRA M5 Maintenance Manual (960-542)