Laptop Won't Turn on

You can see how to repair laptops that don't turn ON or turn ON with no display. voltage rails, schematic, voltage, amperage, check voltage, repairing, motherboard, circuit, block, laptop, Bios, Bios IC, program Bios IC, power circuit, CPU, onboard CPU, ALW voltage, disconnection, short circuit, troubleshoot, multicontroller, southbridge, northbridge, apply voltage, inject voltage