White Wire Black Wire Blue Wire Laptop Charger

In another forum someone identified the sensor wire and left it out in the connection.

White wire black wire blue wire laptop charger.

I have read that an extra wire is used as some kind of a sensor. The one on mine has blue white and black and they are. If the display shows a positive number black is negative b w is positive. Recognize that the black wire is the positive one the white wire is the negative one and the green wire is the ground.

The second adapter however has three wires going out. The first adapter the one that broke has three wires black white and red going out which then connect to the laptop charger pin. So i connected the white wire to the shilding wire and red wire to the core wire of the old 90w adapter s plug. Turn the charger on.

When you re hanging a chandelier or any other ceiling light first find the 3 wires coming out of the hole in the ceiling where the light will go. Turn the meter on. While powered the charger found red wire 19vdc white wire 0vdc black wire in the center pin for feedback to the board. Carefully touch the meter probes black to the black wire red to the b w wire.

Set the meter to read voltage. After connecting the wires make sure to test the voltage on the plug before inserting to the laptop or you might risk damaging your laptop. The black wire will be your hot wire and your whites are neutral depending on your switch setup you can wire nut the blacks together with an extra piece of wire coming from the wire nut to connect the hot to the light as well as the same method with your white wires. Well the white is the sense and that will make laptop know that the right charger is connected the open sheild cable is the power when the big thick sheild is ground but you cant use 2 wire power instead you can use any other 3 wire board useing the same config in other power the sense can be blue like hp or red or grey its simple if you have a multimeter.

White black blue for communication validate adapter and battery power it is best you use a multimeter to check.