The new silkscreening on new model ThinkPads do not list four keyboard shortcut functions (Break, SysRq, ScrLK, Pause). The embedded keypad functionality has been removed from the T430, T430s and T530 systems. The older T42x and T52x keyboard styles will not fit the newer T43x and T53x systems.
The above symptom is associated with, but not limited to, the following systems:
The supported functions and corresponding keyboard shortcut keys are listed below:
Break (FN + B)
SysRq (FN + S)
ScrLK (FN + K)
Pause (FN + P)