If you can ping it then you should be able to connect to it. It's just a matter of playing with settings and browser versions to get it to work. The service guide recommends Opera 9.23 or Explorer...
I have a question i need clarification. We had a problem on a p520 system and had to pull the battery on the service processor card. That did the trick and system booted. We forgot to set the time...
You may have to use an older browser to gain access. I use Opera 9.23 to connect to the ports. I have found problems on the new version of explorer and firefox.
What settings are you using for the serial port. It should be 19200. Also you can reset the IP's for the SP by pulling the service processor out of the system. Once it is out you will see two very...