Toshiba QOSMIO G20 manual Debug port Boot mode error status 2/8, Beep

2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (2/8)

D port status	Inspection items	Details
F005h	Saving key scan code
	Setting TASK_1ms_TSC
	Controlling fan
	Initializing sound items	Enabling system speaker
	(for BEEP)
		Releasing mute
		Making the volume max.
	When request BIOS, EC/KBC	Blinks green (cycle:2s,	on:1s, off:1s)
	rewriting
	When BIOS ROM abnormal	Blinks orange (cycle:2s,	on:1s, off:1s)
	Key input	Prohibition of USB
		BEEP
		Waiting for key input
	Reading CHGBIOSA.EXE /	FDC reset
	CHGFIRMA.EXE
		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	(Key input when error occurred.)
	“CHGFIRMA.EXE”
	Execution of “CHGBIOSA.EXE”
	and “CHGFIRMA.EXE”
IRT
F100h	Prohibition of cache
	Initialization of H/W	Initialization of MCHM
	(before DRAM recognition)
		Initialization of ICH6M.D31.Func0
		Initialization of ICH6M.D31.Func1
		Initialization of USB.Func0,1,2,7
		Initialization of ICH6M.D31.Func3
		Initialization of ICH6M.D31.Func5
		Initialization of FLUTE
	Initialization of PIT channel 1	(Setting the refresh interval “30∝s”)

2-22 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)