Member Avatar for Nick10

I have an HP dv2911us. Everything is stock in it--haven't changed a thing. When sitting idle on the desktop screen, I can hear the fan turn on and off about every 3 seconds. I'd really like the laptop to not make as much noise. What can I do? Thanks.

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Dani AI

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Short cycling (fan coming on and off every few seconds) usually points to either the fan control/sensor logic or an intermittent hardware issue rather than just a constant high temperature. is right that blocked vents/dust make things worse, and is right that power settings can affect how often the fan runs. The practical approach is to diagnose first, then fix what the diagnosis shows.

Quick diagnostic checklist:

  • Watch CPU/GPU load and temperatures while the fan cycles. Use Task Manager/Resource Monitor for processes and a hardware sensor tool (HWInfo/HWMonitor) to log temps and fan RPM. If temps remain low while the fan toggles, suspect a failing fan or a sensor/fan-control fault. If temps spike and then drop with each cycle, it is thermal control doing its job.
  • Boot into BIOS/UEFI or a Linux live USB and observe fan behavior outside Windows. Persistent cycling there points to firmware/hardware rather than a Windows process.
  • Temporarily change Windows power plan advanced settings: Processor -> System cooling policy to Active, and try lowering Maximum processor state (for testing) to 80% to see if the cycling smooths out.
  • Inspect/clean vents with short bursts of compressed air and check that the laptop is on a hard, flat surface (avoid soft surfaces that block vents). If still under warranty, contact HP before opening the case.

If cleaning and software tweaks do not stop rapid cycling, the fan motor or temperature sensor on the motherboard may be failing — replacement of the fan assembly or service will likely be required. Use ESD precautions and beware of warranty voiding if opening the chassis.

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Member Avatar for hughv

It may be getting hot. Look for and clean any dust, especially around the fan intake/exhaust.

Member Avatar for Xlphos

I think if you go to power saving options you can reduce the CPU usage, this will stop it from getting as hot but will slow it down a bit. I did this on my laptop as my fan made a fair bit of noise too.

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