Want to know how the IS215VPROH1B VPRO protection board actually works inside a GE Mark VI turbine control system? In this video, we walk through the board's role in emergency overspeed protection, show how it fits into a triple-redundant TMR setup, and explain trip solenoid control via the TREG terminal board. You'll also see practical maintenance checks, a real-world diagnostic case, and answers to common replacement questions.