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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 resume mode.
To use the printer port LED follow these steps:
1.
Turn the computer's power on, then set to resume mode.
2.
Turn the computer off.
3.
Plug the printer port LED into the printer connector.
4.
Turn the computer on.
5.
Read the LED status from left to right as you face 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 4.
8.
If the final LED status matches any of the test status values in table 2-2, go to
procedure 5.
Table 2-2 Printer port LED resume mode error status
Error status
00H
RAM BIOS error
F0H
Press the reset switch
F1H
Suspend process error (The system will suspend while FDD is accessed, etc.)
F2H
The system has optional ROM, or an optional card (CGA, MDA)
F4H
Backup RAM checksum error
F5H
Main memory checksum error
F6H
Video RAM checksum error
F7H
Extended memory checksum error
F8H
Backup RAM checksum error
F9H
Main memory checksum error
FAH
Video RAM checksum error
FBH
Extended memory checksum error
FDH
Card modem error
FEH
Password error
2-14
Meaning of status
610CT
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