Integrated Intel Core i3, i5, and i7 (BGA socket).
for "dry solder" or broken terminals. If the jack is fine, the search shifts to shorted capacitors or a faulty Charging IC (which may feel hot to the touch). Backlight but No Image brittle mb 15256-1 boardview
The boardview file labeled that node as a 12V plane for the backplane interconnects. But the schematic showed it was also adjacent to a high-speed differential pair for PCIe lane 7. When the board flexed during assembly—or sneezed at the wrong temperature—the glass fibers acted like tiny knives, cutting through the solder mask and creating a microscopic short between power and signal. Integrated Intel Core i3, i5, and i7 (BGA socket)