Laptop making noise fan - Compaq Evo N800c Notebook

Usually, this occurs when the fan has accumulated dust. You should clean the area with a blower where is the cpu fan. If the noise persists, you must have replace your CPU fan latpop.
Regards!

The high pitched noise you hear is most likely caused by the CPU cooling fan on your laptop. If you suspect that this high pitched sound is caused by the fan going out, you can spray your laptop with compressed air to get the dust off of the fan.
This solution will make your laptop work at a cooler temperature, and reduce the noise.

If the problem persists, seek a certified laptop repair specialist.

If there is nothing hitting the fan blades and the fan makes a grinding noise then the fan bearing is faulty. You may be able to place a drop of oil on the bearing under the label in the center of the fan and if this does not work then you need to replace the fan.

Hello:
Generally, all laptops cooling fan start for a second just after power on and you may notice noises. These noises, comming from the fan, are because it is dirty. So, it may be jammed by dust excess. If this is the case, you need to take apart it and inspect the fan while booting the machine. Removing the keyboard would let you see the fan and clean it. Try to move the vane with your finger to make sure if it is not obstructed. Maybe, you need to take the fan out and oil its axle. Besides you can check if its power cord is attached correctly. It is not recommended to operate the laptop with this malfunctioning fan.

I hope this helps you. Thanks

Hello,

Thanks for using FixYa.

It is normal for the laptop's fan to make noise. Sometimes, the noise will not be as bad. The noise actually depends on how hot your laptop is. The hotter the laptop becomes, the louder the fan noise. Your laptop will produce heat depending on the load of the laptop's processor. So if you are multitasking on your laptop, expect the fan to spin faster because it will try to eliminate the extra heat being generated.

I just have a quick tip for you, never use your laptop on top of a bed or any soft surface because the vents under the laptop will not work properly.

I hope this helps. Thanks and good day.
HotRatchet

Does beeping noise happened before turning on laptop? If yes unplug the laptop from the AC Adapter. Just leave AC Adapter ON and connected to the power outlet. Check if AC Adapter is the one making beeping noise. Note: This is an issue with dell AC Adapter laptops
If no beeping noise in AC Adapter then proceed checking it from the laptop. Does beeping noise happened immediately when laptop is turned on? If yes then it might be laptop's hard drive creating the sound. Try to check the BIOS in your laptop under the category performance if the HDD Acoustic is ON either in Normal or Performance. Note: When laptop is in performance the hard drive makes noise due to its speed, this is normal if BIOS HDD Acoustic mode is ON to performance.
If the noise only happens when sometime while working on the laptop, this might be cause by the laptop fan. This also happens after turning on the laptop fan my have dirt and dust, please do check.
If fan was cleaned, HDD performance was checked and AC adapter was checked then, carefully sense if noise is coming from the internal speakers.
Download the latest BIOS update for your laptop then flash the BIOS. Make sure battery and AC adapter are connected when doing these.

take it to an expert... the fan is faulty

Yeah. i had this problem too. the fan is noisy because it is garbage. it needs to be replaced if you want to get rid of the noice. you moving the laptop wen the noise first started is just coincidence. the heatsink is fine, but the fan itself is poorly made. The ball bearings get loose and so the fan doesnt stay in its vertical plane and it kind of shakes a little, thats why it makes the noise. if you open it up and turn your laptop on, and wait for the noise, you will notice that if you push down lightly on the center of the fan, the noise goes away, because you are creating pressure at it's center of gravity point which makes it stop wobbling. you wont see the wobbling with the naked eye, because its much to slight to see, but its definatly enough to make that annoying fighter jet take-off noise..

as far as the noise, thats the sound it makes when something is wrong with the battery (if you ever drain it all the way down and try to boot it, it will make the noise) kind of messed up noise in my opinion, but its not a big deal, as long as it doesnt repeat. 

for the fan, you dont need to replace it if you dont use your laptop a lot, you can try to keep your laptop cooler to keep the fan from turning on also. i suggest one of those USB fan pads that you put under the laptop, or a thermal pad, thermapak makes one for $30 i think, and it drops temps by 6 degrees celcius they claim, i dont know exact numbers but if def helped me. you can also try to put something in the back to keep the back elevated (where all the heat is) and the fan wont spin as much.

i know with desktop fans that get lots of use, noise is the 1st sign of fan failure to come, but ive been using my laptop with that god awful noise for about 4months now, and its still alive and kicking.

good luck!

Yes. It can be replaced. Try to check which fan is making that sound. Do you have a laptop or a PC? On a PC, there are 3 standard fans inside it. one for the CPU, one for the power supply and one for the computer casing fan as well. It depends on which of those fans it's coming from. On a laptop, some laptops' fans actually makes a loud noise which is common but there is a way that it could be lessened but it might slow down your pc and it might overheat it as well. The loud noise on the fans of a laptop actually indicates that it's trying to cool down the system. If it doesn't stop the loud noise, it could indicate a problem switching the fans back to normal and would just continue to spin fast. Try to contact your PC tech for further diagnostics on the laptops fan to indicate if the problem is with the fan or the mainboard as well.

If this is a new problem, replace the fan. If it has always been noisy , I guess you will have to live with it.