Toshiba S4 manual Are

2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-4 Printer port LED boot mode status (3/9)

LED Status	Test item	Message
00h	Prohibition of cache
	Permission of L1/L2 cache in
	FlashROM area
	Initialization of H/W (before	Initialization of MCH
	DRAM recognition)
		Initialization of ICH.D30.Func0
		Initialization of ICH.D31.Func0
		Initialization of ICH.D31.Func1/2
		Initialization of USB Controller
		Initialization of ICH.D31.Func3
		Initialization of ICH Audio
		Initialization of TI Controller
	Initialization of PIT channel 1	(Setting the refresh interval to “30∝s”)
01h	Check of DRAM type and size	When unsupported memory is connected, becoming
	(at cold boot)	HLT after beep sound
	SM-RAM stack area test	HLT when DRAM size is 0
		HLT When it can not be used as a stack
02h	Cache configuration
	Cache permission
	CMOS access test	(HLT when an error is detected)
	(at cold boot)
	Battery level check of CMOS
	CMOS checksum check
	Initialization of CMOS data (1)
	Setting of IRT status	(Setting of boot status and IRT busy flag, The rest bits
		are 0)
	Storing DRAM size in CMOS
03h	Resume branch (at cold boot)	Not resume when a CMOS error occurred
		Not resume when resume status code is not set
		Resume error check
		S3 returning error (1CH) (Resume error LED=7AH)
		SM-RAM checksum check (Resume error
		LED=73H)
		Check of memory configuration change (Resume
		error LED=73H)
		RAM area checksum check in system BIOS
		(Resume error LED=79H)

2-22 [CONFIDENTIAL] TECRA S3 Maintenance Manual (960-532)