1. Open the main casing: first unplug all wires of the main casing. There is no need for a screwdriver here. Generally, the main chassis can be unscrewed directly by hand. Here are four large screws, unscrew them to the left by hand (loose left and tight right), and then remove the main box cover on one side by hand. You just need to remove one piece from the side.
I'm here on the right (the one with cooling holes)
3. Remove the radiator: After opening the main cabinet, you can see that the radiator, that is, a small electric fan, needs to be removed. Turn several knobs around the radiator in the same direction (usually loose left and tight right), then hold the radiator with your hand and take it out with a little force (swinging it left and right is easier).
4. Remove the radiator metal sheet: After removing the radiator, there is a piece of metal on the radiator with a lot of dust inside. It only takes a little effort to remove this radiator, turn it left and right, and turn it out.
5. Clean the radiator dust: After the radiator is removed, you will see a lot of dust inside, which will affect the operation of the radiator and thus affect the heat dissipation effect. If there is too much dust, there will be a lot of machine noise during operation, which will affect the work. Brush it with a brush, and then blow it with a hair dryer until the dust is removed.
6. Clean up the radiator dust: clean it up immediately. It is best to use a brush in combination with a hair dryer. Brush the dust off or loosen it, and then the hair dryer will hang down. When using the hair dryer, it is best to use the hot gear, but not too hot (medium fire).
7. Clean up the dust on the CPU and motherboard: The dust is mainly concentrated on the radiator, but there is still a lot of dust on the motherboard and CPU. Brush off most of the dust or loosen it with a brush, and then blow it with a hair dryer (medium fire is better) until the motherboard and CPU are cleaned.
8. Cleaning the CPU and motherboard: After cleaning, the CPU should be bright and the dust on the motherboard should be less, so as to complete it. After cleaning, the radiator can be installed. Coat cpu with thermal conductive silicone grease.
9. Install radiator: This is the key. It's not as easy to install as it is to take it off. This is a hint. Turn several fixing knobs for installing radiators in the same direction (generally loosen the left side and tighten the right side), then loosen them, then aim the radiators at several empty places inside, insert a few holes first, press a tubular thing at the bottom of the fixing feet with a screwdriver, and then press the remaining fixing feet to insert them.