2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-20 TECRA 9100 Maintenance Manual (960-347)
Table 2-3 Printer port LED boot mode status (1/6)
LED Status Test item Message
FFh Start Register initialization for boot block
B0h Flash ROM check PIT ch.0 initialization
BIOS rewrite flag initialization
Transition to protected mode
Boot block checksum
Checksum check except boot block
B1h EC/KBC rewrite check KBC initialization
B2h BIOS rewrite BIOS rewrite request check
B3h
System BIOS rewrite transition to
IRT
System BIOS rewrite transition to IRT
Initializing Power Management I/O space
Enabling BIOS writing
Serial interrupt control
Disabling BIOS write protection
Enabling SMBus I/O space
Enabling SMBus access
PIT channel 1 initialization
PIT, DMAC, PIC initialization
DRAM configuration
Rewriting BIOS
Cache bus, L2 initialization, configuration
Enabling L1 cache
Memory clear
Protecting flash ROM area cache
Disabling cache
Special register, Intel chip set initialization
B5h Display initialization for Boot Block Storing key scan code
Setting up TASK_1ms_TSC
Display initialization
Sound controller initialization (for beep) B6h
Sound control initialization
Message display
Key input
Reading CHGBIOSA.EXE
00h IRT Check system PIT ch.1 initialization
01h Memory check DRAM type and size check
SM-RAM stack area test SM-RAM stack area test
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