Toshiba Libretto 100CT User Manual page 56

Procedure 3 Printer Port LED Check on Resume Mode
The printer port LED displays the IRT status and test status by turning lights on and off as an
eight-digit binary value for Hibernation mode.
To use the printer port LED follow the steps below:
1. Make sure the computer is in Resume mode.
2. Plug the printer port LED into the computer's parallel port.
3. Turn on the computer's power.
4. Read the LED status from left to right as you face the back of the computer.
5. Convert the status from binary to hexadecimal notation.
6. If the final LED status is FFh (normal status), go to Procedure 4.
7. If the final LED status matches any of the test status values in Table 2-4, perform
Procedure 5.
Table 2-4 Printer port LED Resume mode error status
Error status
F1H System BIOS RAM checksum error
F2H External display card is connected.
F3H HDD was installed.
F4H SMRAM checksum error or memory error during suspend
F5H Conventional memory checksum error
F7H Extended memory checksum error
F8H PnP RAM checksum error
Meaning of status
File No. 960-140
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