Lenovo Ideapad Z565 – Resolving noisy fan issue and cooling problem

After a year of operation, I got increasingly disturbed by the high noise level of my Lenovo Ideapad Z565. Not sure whether it was that loud all the time, I started to pay more and more attention to the fan. The fan operation is controlled by the second button from the right in the row of system buttons in the upper right corner of the keyboard. The fan control button provides three options:

  • off – normal fan operation (default)
  • on – silent mode (touch the button)
  • blinking – “dust clean out” mode (touch the button for some seconds)

Even in silent mode, the fan got very noisy. When my system started to turn off without warning under heavy computational load, I observed that the air flow at the fan exit in the rear left corner of the laptop was a gentle breeze of hot air only. It soon became clear that it was by far too gentle to effectively get rid of the heat energy.

Solution

Finally I decided to have a closer look at the fan itself. The following documents how I accessed the fan of my Lenovo Ideapad Z565. Before dismantling the laptop’s cover, unplug all power supply, remove the battery and check with your warranty conditions! You will find detailed instructions in Lenovo’s Ideapad Z560/Z565 Hardware Maintenance Manual in section 1070 on page 41.

Lenovo Ideapad Z565 Backcover

The highlighted part of the backcover needs to be removed to access the fan of an Lenovo Ideapad Z565.

  1. Turn the laptop upside down and loosen the ten screws of the largest cover plate with a crosshead screwdriver. While the eight general screws can not be removed completely from the cover, put the two sunk-in screws in a safe place for later use.
  2. Remove the cover by gently pressing along its edges, starting from left to right.
  3. Identify the fan in the rear right corner and loosen the three crosshead screws holding the fan in place. Again, as these may be removed completely, put them in a safe place.
  4. Remove the fan from its position to expose the heat fins, that guide the fan air through the laptop chassis outside.
Lenovo Ideapad Z565 Fan Location

After removing the backcover, the fan is seen to be located in the rear right corner.

After removing the fan, the reason for the noisy fan and ineffective cooling soon became clear. A heat conductive copper construction redirects heat energy from the center part of the motherboard to the heat fins, that are placed between the fan and the air outlet of the cooling system. These heat fins are very narrow – too narrow as it was clear by now – and dirt and dust accumulated in the heat fins. These blocked in consequence the air flow and heat energy could not dissipate from the laptop.

Lenovo Ideapad Z565 Heat Fins

After passing the fan, the air leaves the laptop chassis through the heat fins (shown after cleaning).

Cleaning the heat fins and their surroundings with a vacuum cleaner at lowest power removes the dust effectively. Mounting the fan back at its original position with the three screws and fixing the back cover reassembles the laptop. It will be much more silent now and will operate more stable under heavy computational load.

Conclusion

The Lenovo Ideapad Z565’s air ventilation system is poor design. The final heat fins are the most narrow part of the pipeline. Dust and dirt accumulate on the way out and prevent a dissipation of the heat energy. A better filtering system at the air inlets would protect the system from pollution and would be easier accessible for maintenance at the same time. Moreover, I was surprised to learn that the noise is not caused by the fan itself but by the air passing through the heat fins.

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3 thoughts on “Lenovo Ideapad Z565 – Resolving noisy fan issue and cooling problem

  1. Pingback: Lenovo Ideapad Z565 – Resolving sudden shutdowns | zeroset

  2. blackk18

    I had the same problem on my Lenovo G770. Thanks to this article, it works fine now.

    Reply

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