Toshiba T4500 User Manual page 37

To use the printer port LED, follow these steps:
1. Turn off the computer's power.
2. Plug the printer port LED into the T4500 and T4500C's PRT/FDD connector or T4600 and
T4600C's printer connector.
3. Hold down the space bar and turn on the computer's power.
4. Read the LED status from left to right as you are facing 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 3.
7. If the final LED status matches any of the test status values in Table 2-2, 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 22 and
halts, the IRT test has already completed the KBC test. In this instance, the IRT indicates an
error with the system memory test.
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