Set your multimeter to DC volts and check the Gate pin of the discharge MOSFET. If the GS54B isn't sending 5V-10V to the gate, it's in "Protection Mode."
Intel Whiskey Lake-U or Kaby Lake-U series (e.g., i3-7020U, i3-8130U). Graphics (GPU): gs44b gs54b nmc561 schematic cracked
It was a beautiful piece of hardware, a military-grade signal decryptor from the war thirty years ago. Kael ran a hand through his greasy hair. He had spent six months scavenging the wreckage of the orbital drops just to find a unit with a chassis that wasn't fused into a solid lump of slag. He had the physical unit. He had the power supply. But without the roadmap, the GS44b was just a heavy, radioactive paperweight. Set your multimeter to DC volts and check