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DELL N5040 CPU FAN FAILURE / FAN CONSTANTLY ON HIGH

I have a Dell 15 N5040. The CPU fan died on me for no reason. I removed the keyboard and palm rest to find that the laptop that was bought brand new was missing the "4th" screw -- the one the ties down part of the thermal assembly to the video chip. I replaced it with a new fan -- and the fan spins on high constantly and failed the Dell Diagnostics. So I decided to try ANOTHER new fan -- plugged it in and same thing. Can anyone tell me what the problem could be? Could it be the fourth screw it's missing? It's not dust buildup or heat issues. Thanks.

3 Replies
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4 Beryllium

Re: DELL N5040 CPU FAN FAILURE / FAN CONSTANTLY ON HIGH

Hi chauchylongboat,

The Heat Sink and Fan Assembly on this system is installed using three screws only. Here are the pictures showing its dis-assembly:

You may refer to the link for http://bit.ly/12jN7Vb service manual of this system for detailed steps on replacing the hardware components.

Note: Please follow the safety instructions, before you replace any hardware component.

Please run the diagnostics on the system to confirm hardware functionality. Here are the steps:

  • Restart the system and immediately start tapping the 'F12' key to enter the 'Boot Menu'.
  • Use the 'Down Arrow' key to highlight the 'Diagnostics' option. Press the 'Enter' key.
  • The diagnostics will begin. Please note the exact error message/code, if any appears on the screen.

Also, follow the steps listed on the link http://dell.to/Y7RuOY for troubleshooting the fan noise issue.

Please share the results.

Re: DELL N5040 CPU FAN FAILURE / FAN CONSTANTLY ON HIGH

The error code is: 2000-0511  Msg: Fan failed to respond correctly. Diagnostics show all RPM for high, middle and low are: 4801RPM for all.

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4 Beryllium

Re: DELL N5040 CPU FAN FAILURE / FAN CONSTANTLY ON HIGH

Hi chauchylongboat,

The error message 2000-511 indicates fan failure. Please provide the validation code as well that you received along with the error message.

I recommend that you update the BIOS of the system to latest A05 version. Here are the steps:

  • Click on the below link: http://dell.to/17Imfvk
  • Click on 'Download File'.
  • Select 'For Single File Download via Browser'.
  • Click on 'Download Now'.
  • Save the BIOS on your desktop.
  • Once the BIOS is downloaded on the desktop, right click on it and select 'Run as administrator'.
  • Follow the prompts on screen and restart your computer.

Note: Make sure the ac adapter is connected and the battery is charged 10% or above to update the BIOS. Also, disconnect all the external peripherals before updating the BIOS. All the programs should be closed and documents saved.

Please observe the system performance after BIOS update. If the issue still persist hardware replacement may be required.

Please reply if you have any further questions.