Secondary IDE Controller Resource Conflict with P5-75

Problem: On boot up during POST, the following error message appears: "Secondary IDE
Controller Resource Conflict."

Solution: Continue the boot up (use F5 on "Starting MS-DOS"). Disable PnP via the 3Com configuration utility as follows:

Step 1 - Boot a minimal DOS setup, making sure that no EtherLink III drivers are loaded.

Step 2 - Insert EtherDisk, version 4.2 or higher, in the diskette drive and type A: at the DOS prompt.
Step 3 - Enter PNPDSABL at the DOS prompt. The configuration and diagnostic program will execute twice. The first time it executes, the configuration and diagnostic program kick the EtherLink III out of its PnP wait. During the second execution, it disables Plug and Play. The final message displays: "The 3C5X9 adapter, adapter number 1, was successfully configured."

Step 4 - Remove the EtherDisk from the diskette drive and cycle the power by turning the computer power off and then back on again.