File No. 960-140
1-17
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.
Figure 2-2 Printer port LED
To use the printer port LED follow the steps below:
1.
Plug the printer port LED into the computer’s parallel port.
2.
Hold down the space bar and turn on the computer’s power.
3.
Read the LED status from left to right as you are facing the back of the computer.
4.
Convert the status from binary to hexadecimal notation.
5.
If the final LED status is FFh (normal status), go to Procedure 4.
6.
If the final LED 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.
Summary of Contents for Libretto 100CT
Page 8: ...File No 960 140 Chapter 1 Hardware Overview ...
Page 9: ...File No 960 140 1 ii ...
Page 29: ...File No 960 140 1 18 ...
Page 30: ...File No 960 140 Chapter 2 Troubleshooting Procedures ...
Page 31: ...File No 960 140 2 ii ...
Page 36: ...File No 960 140 1 3 Figure 2 1 Troubleshooting flowchart 1 2 ...
Page 72: ...File No 960 140 Chapter 3 Tests and Diagnostics ...
Page 73: ...File No 960 140 3 ii ...
Page 147: ...File No 960 140 3 72 ...
Page 148: ...File No 960 140 Chapter 4 Replacement Procedures ...
Page 149: ...File No 960 140 4 ii ...
Page 161: ...File No 960 140 4 10 3 Seat the HDD cover and fasten it with two M2x14 silver screws ...
Page 189: ...File No 960 140 4 37 Figure 4 32 Removing the I O adapter board ...
Page 191: ...File No 960 140 Appendices ...
Page 192: ...File No 960 140 App ii ...
Page 202: ...File No 960 140 A 6 ...
Page 206: ...File No 960 140 B 4 ...
Page 234: ...File No 960 140 G 2 ...
Page 236: ...File No 960 140 H 2 ...