Toshiba T2000 Maintenance Manual page 31

Procedure 2
Printer Port LED Check
The printer port LED displays the IRT program status and error status as a hexadecimal value after
the T2000 is turned on.
1. Connect the printer port LED to the printer port.
2. After turning the system on, read the LED status from left to right as you are facing
the back of the computer.
3. If the final LED status is FFh, refer to Procedure 3. If the final LED status matches
Normal Error
Status Status
02h 82h
03h 83h
04h 84h
05h
06h
07h 87h
08h
09h 89h
0Ah 8Ah
0Bh
0Ch
0Dh 8Dh
0Eh
0Fh 8Fh
10h 90h
11h 91h
12h 92h
13h 93h
14h 94h
A7h
14h
15h 95h
16h
17h 97h
18h 98h
19h 99h
1Ah 9Ah
ERROR ENCOUNTERED INITIALIZING HARD DISK DRIVE
ERROR INITIALIZING HARD DISK CONTROLLER
Meaning
KBIC IBF/OBF test, video initialization
KBIC IBF test (0AAh command)
KBIC OBF test (55h check)
Reserved
LSI initialization (DMA, PIT, PIC, RTC)
CPU test 2 (registers)
RTC initialization (register B)
ROM checksum test (64KB)
Video initialization
Reserved
Reserved
PIT channel 2 test and its initialization
Reserved
CMOS RAM test
DMA channel 0 test
DMA channel 1 test
DMA page register test
KBSC test and its initialization
Memory refresh test
Backup RAM test
Protect mode test
First 64KB RAM test
Interrupt vector setup
Video option test
V-RAM test
PIC channel 1 test
PIC channel 2 test
Process
Halt
Halt
Halt
Continue
Halt
Continue
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Halt
Continue
Halt
Halt
3 beeps continue
3 beeps continue
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