: 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
: Refers to Jumper 4 . This is a physical bridge or a zero-ohm resistor on the motherboard that connects two parts of a circuit. What it means for repairs : If there is a short circuit, a
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