Toshiba Portege R500 Maintenance Manual page 66

2 Troubleshooting Procedures
Table 2-5 Debug port (Boot mode) error status (2/10)
D port status
F00AH Saving key scan code
A setup of TASK_1 second_TSC
F00BH
Controlling fan
Initializing sound items
(for BEEP)
When request BIOS, EC/KBC
rewriting
BIOS ROM error
Key input
Reading CHGBIOSA.EXE /
CHGFIRMA.EXE
F00CH
2-20
Inspection items
[CONFIDENTIAL]
2.4 System Board Troubleshooting
Details
Permission of system speaker
Releasing mute
Making the volume max (model that can control volume)
Blinks green (cycle:2s, on:1s, off:1s)
Blinks orange (cycle: 2s(On:1s,Off:1s))
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
Execution of "CHGBIOSA.EXE" and
"CHGFIRMA.EXE"
PORTEGE R500 Maintenance Manual (960-634)