Toshiba Portege R400 Series, Maintenance Manual

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2 Troubleshooting Procedures
2-22 [CONFIDENTIAL] PORTEGE R400 Maintenance Manual (960-623)
Table 2-4 Debug port (Boot mode) error status (2/10)
D port status Inspection items Details
F008H
Saving key scan code
A setup of TASK_1 second_TSC
Controlling fan
Permission of system speaker
Releasing mute
Initializing sound items
(for BEEP)
Making the volume max (model that can control volume)
When request BIOS, EC/KBC
rewriting
Blinks green (cycle:2s, on:1s, off:1s)
BIOS ROM error Blinks orange (cycle: 2s(On:1s,Off:1s))
F009H
When BIOS renewal is prohibited
class 2 security model Only ,Blinks orange (cycle:
8s(On:4s,Off:4s)),HLT after 30s beep
sound
Prohibition of USB
BEEP
Key input
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
F00BH
Reading CHGBIOSA.EXE /
CHGFIRMA.EXE
Execution of “CHGBIOSA.EXE” and
“CHGFIRMA.EXE”