Check 1 - Toshiba Tecra 700CS Maintenance Manual

Procedure 2 Printer Port LED Check on Boot 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 boot mode. Figure 2-2 shows the printer port LED.
To use the printer port LED, follow these steps:
1. Turn on the computer, then set it to boot mode.
2. Turn off the computer.
3. Plug the printer port LED into the computer's parallel port.
4. Hold down the space bar and turn on the computer.
5. Read the icon status from left to right as you are facing the back of the computer.
6. Convert the status from binary to hexadecimal notation.
7. If the final icon status is FFh (normal status), go to Procedure 3.
8. If the final icon status matches any of the test status values in table 2-3, perform

Check 1.

NOTE: If an error condition is detected by the IRT test, the printer port LED
displays an error code after the IRT test ends. For example, when the printer port
LED displays 1F and halts, the IRT test has already completed the Display
initialization. In this instance, the IRT indicates an error has been detected
during the system memory test.
2-14
Figure 2-2 Printer port LED
700 Series