Method 1: The exhaust fan coil is aged, and when it is short of oil, add oil with engine oil or peanut oil. Add oil to the exhaust fan shaft and the slot next to the coil, and install the bubbles later
Method 2: Clean up the excessive dust.
Method 3: The fixed screw is loose, resulting in position deviation, and the screw needs to be fixed again.
cooling fan for laptop cooling fan for laptops cooling fan laptop CPU Fan