My laptop charger turns off as soon as I plug it in to the laptop. It's not the charger that's the problem. Could it be a bad motherboard? - Quora
![adapter - What is the purpose of all these resistors and capacitors in this power supply? - Electrical Engineering Stack Exchange adapter - What is the purpose of all these resistors and capacitors in this power supply? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/M0oMd.png)
adapter - What is the purpose of all these resistors and capacitors in this power supply? - Electrical Engineering Stack Exchange
Advice required for simple Laptop Power Supply ID-Sense circuit | Electronics Forum (Circuits, Projects and Microcontrollers)
![Step-Up DC-DC Converter Circuit for Laptop Charger/Adapter, Convert 12V(9-14) to 19V(16-21V) – Deeptronic Step-Up DC-DC Converter Circuit for Laptop Charger/Adapter, Convert 12V(9-14) to 19V(16-21V) – Deeptronic](https://www.deeptronic.com/wp-content/uploads/2014/05/hamuro-step-up-dc-converter-12v-19V-for-laptop-circuit-schematic-diagram.jpg)