Laptop cooling fan does not turn how to do computer cooling fan troubleshooting

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Reasons Why a Notebook Computer Fan Might Not Spin

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Aging

  1. Fan Wear and Tear: Over time, the notebook fan may stop rotating due to aging, particularly if the fan lacks lubrication.
  2. Solution: If the fan isn’t spinning because it’s running low on oil, disassemble the notebook and add lubrication to the fan.

Cleaning Issues

  1. Dust Accumulation: Excessive dust inside the fan can prevent it from rotating. Regular cleaning is essential to maintain proper function.
  2. Rusty Fan Shaft: If the fan shaft is rusted, disassemble the notebook and apply a suitable lubricating oil to the shaft.
  3. Cleaning Procedure: When cleaning, start by disassembling the heat sink and the fan to ensure thorough maintenance.

Motherboard Issues

  1. EC Control: The fan is mainly controlled by the Embedded Controller (EC), which adjusts fan speed based on the CPU’s temperature data.
  2. Component Failure: A simple issue might be a damaged power supply transistor, while more complex problems could involve multiple components, such as the temperature control circuits. For instance, in some IBM notebooks, a failure in the temperature monitoring circuit (e.g., H8) can cause a fan error.
  3. Notebook Complexity: Unlike desktop computers, notebook fans vary widely depending on the model. Disassembly and repair often require specific skills and experience.

Common Computer Fan Faults and Solutions

  1. Fault 1: Fan Doesn’t Start Despite High Temperature
    • Issue: The fan doesn’t start to cool down even when the computer’s temperature is high, only spinning briefly at startup.
    • Cause: The cooling fan primarily cools the CPU. If other components like the hard drive, graphics card, or motherboard overheat, the fan might not activate.
    • Solution: To test the fan, run a resource-intensive game. If the fan still doesn’t work, the issue likely lies with the fan itself.
  2. Fault 2: Sluggish Performance, Crashes, and Random Restarts
    • Issue: The laptop becomes slow, crashes, or restarts randomly, and the fan is silent despite high body temperature.
    • Cause: The cooling fan might have been improperly installed, preventing it from operating correctly.
    • Solution: Remove and reinstall the cooling fan to ensure proper installation.
  3. Fault 3: Computer Shuts Down After Running for a While
    • Issue: The computer powers on but shuts down after a short time, only restarting after a cooldown period.
    • Cause: Foreign objects might obstruct the cooling fan or its air duct, causing the CPU temperature to rise and triggering the computer’s self-protection mechanism, leading to automatic shutdown.
    • Solution: Disassemble the notebook and remove any foreign objects from the fan or air duct.
  4. Fault 4: Inconsistent Fan Operation
    • Issue: The CPU cooling fan runs intermittently, even when the computer’s temperature is high.
    • Cause: The CPU temperature hasn’t reached the threshold for the fan to activate. Typically, notebook cooling fans start working when the temperature exceeds 70°C.
    • Solution: Ensure that the fan is set to activate at the correct temperature or consider adjusting the fan’s temperature threshold if possible.
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