Troubleshooting Procedures - Toshiba Satellite Pro M10 Series Maintenance Manual

2 Troubleshooting Procedures

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