Signs indicating the laptop CPU Fan might be faulty and need replacement:

- Your Keyboard Feels HotThis may be something that occurs only while doing graphically intensive tasks (gaming, video editing, etc.) or it could be something that happens constantly.- Odd Noises Are Coming From Your LaptopIf you’re hearing a grinding or starting and stopping noise coming from your laptop, you may have a computer fan issue. Grinding can be due to damaged fan blades and starting and stopping could be due to your fan receiving inconsistent power from your laptop’s motherboard.- Your Laptop Freezes Up For No Apparent ReasonIf you’re noticing that in addition to your keyboard feeling hot, your computer is locking up without you doing anything overly intense, you’re almost certainly experiencing a heat issue.- Odd SmellsSometimes heat gets caused via ventilation issues in your laptop. These ventilation issues are created by dust building up in your system which makes your computer fan less efficient.It also creates conditions in which dust balls and other foreign objects can start to burn and smell funky.- You Don’t Feel Any Air Coming Out of Exhaust PortsIf you’re not hearing or feeling fan activity and your computer is running hot, your fan may not be working. - Your Computer Shuts Off by ItselfWhen your computer gets hot to the point that it can start to incurring serious damage, its CPU should automatically shut down all systems.