Use a diode test on your multimeter to check for shorts between the Drain and Source pins.
Sometimes the schematic is not publicly available due to NDAs. Here is your alternate strategy: bm5291 ver 13 schematic free
The refers to a specific motherboard revision, frequently associated with Lenovo laptops (such as the IdeaPad S110 series) or similar budget-friendly notebook designs produced by original design manufacturers (ODMs) like Bitland . Finding a free schematic for this specific version requires searching through specialized community forums and file-sharing repositories catering to laptop repair technicians. Schematic Details for BM5291 Ver 1.3 Use a diode test on your multimeter to
Locating the step-down converters that power the CPU and memory subsystems. bm5291 ver 13 schematic free
Once you have the schematic, you can use a multimeter to diagnose the board.
