The red wire is marked in the adapter as v.
Color code white wire black wire blue wire laptop charger.
While powered the charger found red wire 19vdc white wire 0vdc black wire in the center pin for feedback to the board.
There are three wires in it black white and blue.
If you have the color red black white and green this post will teach you the corresponding color code for that.
I have an hp laptop adapter but the end going into the laptop is broken.
Old wire has blue black white new wire has green gray white.
I just want to put a new electric plug on the end.
The one on mine has blue white and black and they are.
I have read that an extra wire is used as some kind of a sensor.
I am thinking these are live neutral and ground respectively.
The problem with your answer is that i have bought a new computer i only need the charger for a short time to get the info off the old computer.
Apr 26 2019.
In another forum someone identified the sensor wire and left it out in the connection.
Why is this plug different.
I assume the hot wire is the yellow with the green stripe.
The bad adapter has red white and black the other has blue white and black.
The first adapter the one that broke has three wires black white and red going out which then connect to the laptop charger pin.
Dec 25 2012 3 090 104 24 440 470.
The second adapter however has three wires going out.
Which one to connect where.
How do i connect the wires.
So i connected the white wire to the shilding wire and red wire to the core wire of the old 90w adapter s plug.
Question how to check the laptop charger.
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.
White black blue for communication validate adapter and battery power it is best you use a multimeter to check.