To enable or disable the link test for an on-board TPE (hme) port, you must first know the device name for the I/O+ board. To list the device names:
Shut down the system and take the system into OpenBoot.
Determine the device names of the I/O+ boards:
Use this method while the operating system is running:
Become superuser.
# eeprom nvramrc="probe-all install-console banner apply disable-link-pulse device-name " (Repeat for any additional device names.) # eeprom "use-nvramrc?"=true
Reboot the system (when convenient) to make the changes effective.
Use this alternate method when the system is already in OpenBoot: