Board Failure

Machine: _k40
Board: _ LaserBoard cohesion 3d. order number: [Order #52598] (04/05/2023)

Firmware: _Smoothie and GRBL"I have a new board and I’m using whatever it came with".

Problem/ Question: This card was working fine so far. and suddenly VMOT on (Red) is always on. I ordered this card on [Order #52598] (04/05/2023)

In the documentation it says On a Cohesion3D LaserBoard, there are additional protections on the board, so if you have a short on the 5v rail this could be a protection measure saving your board from harm.
What are these protections.

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