In this guide I will disassemble an Asus K55N-DS81.
Make sure the laptop is turned off before you start taking it apart.
Unlock the battery and push on the release latch.
Remove the battery.
Remove two screws securing the bottom cover.
Slide the cover to the shown direction and remove it.
Under the cover you can access the hard drive and both RAM slots.
In my laptop I had only one RAM module installed.
Remove four screws securing the hard drive assembly to the case.
Slide the hard drive assembly to the left to disconnect it from the motherboard.
Remove the hard drive.
There are five retainers securing the keyboard on the top.
Push on the retainer with a flathead screwdriver.
While the retainer pushed in, insert a sharp object under the keyboard and lift it up.
Unlock remaining four retainers.
Lift up the keyboard and turn it upside down on the palm rest.
Now you can access and unlock the keyboard cable.
In order to unlock the connector you’ll have to lift up the right side of the retainer clip with your fingernail.
After that pull the cable from the connector.
Remove the keyboard.
The optical drive is secured by one screw located under the keyboard.
Remove the screw and pull the optical drive out of the case.
Remove the drive.
Remove all shown screws from the bottom of the laptop.
I suggest making notes from where you removed the screws.
There are three different types of screws used on the bottom.
Remove five screws securing the top cover/palm rest assembly.
Disconnect the power button cable and touchpad cable.
Here’s how to disconnect these cables.
Lift up the retainer and pull the cable out of the connector.
Start separating the palm rest assembly from the bottom case.
I am using a guitar pick to separate two parts from each other.
Remove the palm rest assembly.
On the other side of the assembly you can access the power button board and touchpad.
When the top cover removed, you can access the cooling fan, DC jack, USB board and motherboard.
In order to remove the cooling fan it’s necessary to remove the motherboard first.
Remove three screws securing the motherboard assembly.
Disconnect the display cable, speaker cable and USB board cable.
Here’s how to disconnect the speaker cable. Simply unplug the black male connector from the female connector.
Do not pull by the wires. Unplug it by the connector edges.
Here’s how to disconnect the display cable.
Lift up sticky tape securing the connection and unplug the cable.
Disconnect two antenna cables from the wireless card.
Un-glue the display cable from the fan.
There is a small plastic retainer securing the motherboard to the case.
Push on the retainer to release the motherboard.
Lift up the motherboard a little bit so you can get access to the power jack cable.
Disconnect the power jack cable from the motherboard.
Now you can remove the motherboard completely.
The cooling fan is a part of the heat sink assembly.
The heat sink secured to the motherboard by four screws.
Asus K55N DC jack is attached to a cable. If the jack failed, it can be easily replaced with a new one.
This disassembly guide should work for all Asus K55N series models.