Specific steps to open the back cover:

1. Turn the notebook over toward you with your hands, and first push the battery fixing buckle outward to the end. The laptop battery has two buckles: a fixed buckle and a movable buckle. Then push the movable buckle outward with one hand while taking out the battery with the other hand. As shown in the picture below:

2. After taking off the battery, hold the notebook upright by hand and unscrew the screws that fix the back cover. If there is a logo on the battery slot, be careful to uncover the logo. There are often hidden screws under the logo. If all the screws are not removed, the back cover cannot be opened.

3. After removing the screws, place the notebook flat on a table with your hands, slowly press it hard and push down to remove the back cover. Please note here that you must not insert a knife or other sharp object into the seam of the back cover to lift it up. This is because there is a buckle on the top of the back cover. Turning it upward can easily cause the buckle to break, thus damaging the computer.

4. Next, remove the screws fixing the fan and the fan baffle screws. Even if the fan cannot be completely removed, you can already use a small tool to sweep dust.

5. After removing the above screws, open the baffle and carefully sweep the dust with a small cleaning tool. After cleaning, turn the notebook back down and pat it slowly to remove all the dust. As shown in the picture