Toshiba PORTEGE M400 Maintenance Manual page 70

2 Troubleshooting
Table 2-3 Debug port (Boot mode) error status (2/10)
D port status
F009h Saving key scan code
Setting TASK_1ms_TSC
Controlling fan
Initializing sound items
(for BEEP)
When BIOS, EC/KBC rewriting
is requested
When BIOS ROM is abnormal
When BIOS renewal is
prohibited
Key input
Reading CHGBIOSA.EXE /
CHGFIRMA.EXE
F100h Renewal of micro code
(In model supporting HTT)
Prohibition of cache
Permission of L1/L2 cache in
Flash ROM area
2-22 [CONFIDENTIAL]
Inspection items
2.4 System board Troubleshooting
Details
Enabling system speaker
Releasing mute
Making the volume max
Blinks green (cycle:2s, on:1s, off:1s)
Blinks orange (cycle:2s, on:1s, off:1s)
Blinks 8 second cycle (On:4s, Off:4s) Beeps
30 second and halts D port=F00Bh
Temporary prohibition of USB
Beeps
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
Calculation of directory start head and
sector
Read one 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"
PORTEGE M400 Maintenance Manual (960-541)