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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 610CT power, then set to boot mode.
2.
Turn off the computer's power.
3.
Plug the printer port LED into the 610CT Printer connector.
4.
Hold down the space bar and turn on the computer's power.
5.
Read the LED 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 LED status is FFh (normal status), go to Procedure 3.
8.
If the final LED status matches any of the test status values in table 2-1, 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 has been detected during the next item,
system memory test.
610CT
Figure 2-2 Printer port LED
2-11
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