In this guide, I’ll explain how to disassemble Asus X502CA to remove and replace the battery, hard drive, heat sink, wireless card, cooling fan, and motherboard.
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Remove all screws from the bottom case.
Turn over the laptop, pry up the palm rest with a pry bar.
Lift up the palm rest, disconnect keyboard cable and touchpad cable, you can remove the palm rest.
Here are palm rest and keyboard
When the palm rest removed, you can get access to the battery, hard drive, speaker, USB board and motherboard.
Remove four screws securing the battery, unplug the battery connector from the motherboard, lift up and remove the battery.
The laptop comes with a 5136mah, 38wh Li-polymer battery, Asus P/N: C21-X502.
Remove four screws securing the hard drive module, sliding it to the left.
Asus X502CA comes with an HGST 500GB 5400RPM hard drive.
Now disconnect all cables from the motherboard.
Disconnect two wireless card antenna cables.
Remove all screws securing the motherboard, lift up and remove the motherboard from the base.
On the other side of the motherboard, you can access the wireless card, CMOS battery, heat sink and cooling fan.
The 4GB RAM is soldering on the motherboard.
Remove one screw securing the wireless card.
The laptop featured an AZUREWAVE AR5B125 wireless card.