Toshiba TECRA S1 - Manual (Page 54)

2.4 System Board 2 Troubleshooting
TECRA S1 Maintenance Manual 2-17
Procedure 3 Printer Port LED Check (in Resume Mode)
The printer port LED displays the POST status and error status by turning lights on and off as
an eight-digit binary value obtained in the resume or suspend mode after the system unit is
switched on.
Follow the steps below to use the printer port LED:
1. Turn on the computer and set the resume or suspend mode.
2. Turn off the computer.
3. Plug the printer port LED into the computer's parallel port (printer port).
4. Read the LED status from left to right as you are facing the back of the computer.
5. Convert the LED status from binary to hexadecimal notation.
6. If the final LED status is FFh (normal status), go to Procedure 5.
7. If the final LED status matches any other status in Table 2-2, go to Procedure 6.
Table 2-2 Printer port LED resume mode status (1/7)
< Resume mode >
LED Status
(Hexadecimal)
Test Item Description
0H DIAG_SYSTEM_INIT Boot started,read the cmos data for makesure
main board power is stable
1H DIAG_A20_DISABLE Disable A20 through A20
2H DIAG_INIT_CHIPSET Initialize ChipsetSet,load chipset default
size chache RAM
3H DIAG_TEST_RAM send patten for test the basic 640k RAM
4H DIAG_MOVE_BB_LOADER Move boot load segment into the RAM
5H DIAG_EXECUTE_IN_DRAM program execution from DRAM
6H DIAG_USER_FLASH_CHECK Test print port for check
crisis option is enable or not
7H DIAG_SHADOW_BIOS Decompress the system BIOS, and
Shadow System BIOS to RAM
8H DIAG_CHECKSUM_BIOS Checksum System BIOS ROM
9H DIAG_NORMAL_BOOT Jump to the reset point
AH DIAG_CRISIS_BOOT Proceed with Crisis Boot,first initial
superio and boot device
FH DIAG_FATAL_ERROR Fatal Error,like the RAM error or ROM error
CCH DIAG_CRISIS_BEGIN Start process the Crisis recovery procedure
99H DIAG_RESUME_RAM_ERROR Resume SMRAM not Found