1. Turn the notebook upside down, and first push out the fixing button of the battery to the end. Notebook batteries always have two buckles: a fixed buckle (which will not bounce back when pressed) and a movable buckle (which will bounce back when not pressed), one on each side. As shown in the figure below:

2. Then, push the movable buckle outward with the other hand, and take out the battery downward with the other hand. As shown in the figure below:

3. After taking out the battery, erect the notebook and unscrew the screw that fixes the back cover. Here, I would like to remind everyone that if the battery tank has a trademark, pay attention to unveiling the trademark. Often screws are hidden under trademarks. You can't open the back cover without removing all the screws. As shown in the figure below:

4. After the screws are removed, put the notebook flat, press it gently, and remove the back cover. I would like to remind everyone that sharp tools such as knives must not be inserted into the seams of the back cover and lifted upward. This is because there is a buckle above the back cover, which is easy to break when lifted. As shown in the figure below:

5. Here, just unscrew the screws that fix the fan and the fan baffle. At this time, although the fan can't be completely taken out, we can already use gadgets to sweep the dust. As shown in the figure below:

6. After removing the above screws, open the baffle, carefully sweep the dust with a small broom, turn the notebook back after sweeping, and pat it gently to shake off all the dust. As shown in the figure below: