: If there is a short circuit, a tech might "blow" or remove this jumper to see if the short is on the "upstream" side (the power source) or the "downstream" side (the components consuming power).
If you are looking at this on a board or a schematic (like a BRD file or PDF), it usually serves one of two purposes: PP LV Jmp4
: Stands for Positive Plane . This indicates a power line or "rail" that carries a specific voltage across the board. : If there is a short circuit, a