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2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-22 Satellite Pro M10 Series Maintenance Manual (960-431)
Table 2-3 Printer port LED boot mode status (1/6)
LED Status Test item Message
FFh Start Register initialization for boot block
PIT ch.0 initialization
BIOS rewrite flag initialization
Transition to protected mode
Boot block checksum
B0h Flash ROM check
Checksum check except boot block
B1h EC/KBC rewrite check KBC initialization
B2h BIOS rewrite check BIOS rewrite request check
System BIOS rewrite
transition to IRT
System BIOS rewrite transition to IRT
BIOS rewrite process BIOS rewrite register initialization
PIT channel 1 initialization
PIT, DMAC,PIC initialization
Memory type check
Cache bus, L2 initialization, configuration
Enabling L1 cache
Memory clear
B3h
Protecting flash ROM area cache
Enabling FDC interruption
HW debug
B7h FDC interruption
Display initialization
Sound controller initialization (for beep)
Message display
Key input
B8h Sound control initialization
Reading CHGBIOS.EXE
IRT Check system
Protecting cache
Special register, Intel
®
chip set initialization
00h IRT Check system
PIT channel 1 initialization
01h Memory check DRAM type and size check
02h SM-RAM stack area test SM-RAM stack area test
Enabling L1 cache 03h CMOS check and
initialization
CMOS access test