Earlier this year, Lenovo made a small change on their T400 and related platforms.   The Ctrl-P option disappeared when attempting to access the MEBx (Management Engine BIOS Extension screens for Intel Active Management Technology).   If you browse through the Lenovo BIOS update posting, there is a brief mention of this change.

 

The main reason was to improve boot times.   The difference is a few seconds.   All of the Intel AMT functionality is still present.

 

To access the MEBx screen, press F12 during the POST process to access the Boot Menu.

 

access-MEBx-T400.gif

The option "Enter ME Configuration Screens" will access the MEBx.

 

The option "Initiate a Remote Connection" is for the Client Initiated Remote Access (CIRA), more commonly referred to as "Fast Call for Help" - the ability for Intel AMT to make a call home for assistance.