Sounds like you have gone through just about everything you can. You have checked cable, emulator settings, confirmed working on other switch, rebooted switch, and set to default and it still is not working. It is sounding more and more like it could be a hardware issue with that port. Is the unit still under warranty?
Hi All,  I have two powerconnect 6248s. The first I've had for several months. The second I just ordered recently.   I'm unable to console in to the second switch. I'm using the same settings (minicom) and cable that I use regularly to connect to the first switch.   Any thoughts on how to resolve this? I cannot see any boot dialogue after resetting switch 2.  Thanks,
Console (serial) port on Powerconnect 6248 