Laptop fan repeatally starting and stoping

Computer0304

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My laptop's fan kept on turning off and on after leaving it on for 1-3 hours without using it yesterday. For some reason, when I first booted up this PC today, the fan did not start right away but then, the fan went really fast so I restarted and this time the fan started on bootup. Should I be worried about this?:huh:
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell Vostro 400/Dell XPS 8700(Slightly Customized for me by Dell)/Toshiba Satellite T135
OS
Windows 7 Professional 32-bit/Windows 8 64-bit/Win7 Pro64-bit
CPU
Intel Core 2 Quad Q6600/Intel Core i7 4790/Intel Pentium
Memory
2GB/16GB/4GB
Graphics Card(s)
Intel G33/G31 Express(Vostro)/NVIDIA GeForce GTX 745(XPS)
Monitor(s) Displays
HP 2009m(Vostro)/ViewSonic VX2250wm-LED(XPS)
Screen Resolution
1600x900(Vostro)/1920x1080(XPS)
Hard Drives
Seagate ST3160815AS(Vostro)/Western Digital Blue(Satellite)
External:
Western Digital My Passport 0748
Samsung HM121HC
Keyboard
Dell L100)(Vostro)/Dell KB2133p(XPS)
Mouse
Dell M-UAV-DEL8(XPS)
Internet Speed
100 Mbit/s(Only when IPTV is plugged out)
Antivirus
Avast, Malwarebytes PRO
Browser
Internet Explorer 11
Other Info
Note: Names with slashes between two different parts mean that the left is my old desktop and the right is my old laptop and the middle is my new desktop.(Unless specified)
Ping is horrible for servers overseas in US and Europe.
New laptop:LG Gram(Not available in US) Processor:Intel Core i3 4th Gen Ultra Low Power RAM:4GB Hard Drive:SK Hynix OEM MSATA or M.2 Graphics:Intel HD
Could be from heat, try using sleep when not in use.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dude Build
OS
Windows 10 Pro X64
CPU
Intel(R) Core(TM) i5-3570K CPU OC@ 4.5GHZ Turbo
Motherboard
MSI Z77A-G45 Gaming
Memory
8.00 GB DDR3 1600Mhz
Graphics Card(s)
MSI Gaming X GTX 1070
Sound Card
Realtek High Definition
Monitor(s) Displays
Dell S23O9W, HP L1710
Screen Resolution
DELL-1920 x 1080 HP-1280 x1024
Hard Drives
Crucial m4 256 SSD, WD 7200RPM 500GB WD 1TB
PSU
Seasonic X650 GOLD
Case
Zalman Z12
Cooling
Antec Kuhler 920
Keyboard
Logitech
Mouse
MSI DS100 Interceptor
Internet Speed
50 down and 5 up
Antivirus
MSE
Browser
Chrome, IE 11
Other Info
Logitech X-620 Speakers
My laptop's fan kept on turning off and on after leaving it on for 1-3 hours without using it yesterday. For some reason, when I first booted up this PC today, the fan did not start right away but then, the fan went really fast so I restarted and this time the fan started on bootup. Should I be worried about this?:huh:

Hi Computer0304, When did you last clean out the inlet and exhaust ports on the laptop , Dust has an habit for getting into laptops and causing heat issues ,try blowing the ports out with a can of compressed air :)
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
self build
OS
win 7 ultimate32bit, Win8.1pro wmc 32bit
CPU
amd phenom x4 9600
Motherboard
asus m2n32-sli deluxe
Memory
corsair twinxs 2x2gb
Graphics Card(s)
2x nvidia 1gb 8500gt
Sound Card
onboard
Monitor(s) Displays
23" PB Viseo 233d
Screen Resolution
1920x1080
Hard Drives
maxtor sata 500gb
maxtor sata 320gb
fujitsu sata200gb
PSU
oryxx tornado 750w
Case
thermaltake xaser lll
Cooling
artic freezer64 pro + 7 case fans
My laptop's fan kept on turning off and on after leaving it on for 1-3 hours without using it yesterday. For some reason, when I first booted up this PC today, the fan did not start right away but then, the fan went really fast so I restarted and this time the fan started on bootup. Should I be worried about this?:huh:

Hi Computer0304, When did you last clean out the inlet and exhaust ports on the laptop , Dust has an habit for getting into laptops and causing heat issues ,try blowing the ports out with a can of compressed air :)
OK, I'll try to do that. I have never dusted the fan after getting the laptop.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell Vostro 400/Dell XPS 8700(Slightly Customized for me by Dell)/Toshiba Satellite T135
OS
Windows 7 Professional 32-bit/Windows 8 64-bit/Win7 Pro64-bit
CPU
Intel Core 2 Quad Q6600/Intel Core i7 4790/Intel Pentium
Memory
2GB/16GB/4GB
Graphics Card(s)
Intel G33/G31 Express(Vostro)/NVIDIA GeForce GTX 745(XPS)
Monitor(s) Displays
HP 2009m(Vostro)/ViewSonic VX2250wm-LED(XPS)
Screen Resolution
1600x900(Vostro)/1920x1080(XPS)
Hard Drives
Seagate ST3160815AS(Vostro)/Western Digital Blue(Satellite)
External:
Western Digital My Passport 0748
Samsung HM121HC
Keyboard
Dell L100)(Vostro)/Dell KB2133p(XPS)
Mouse
Dell M-UAV-DEL8(XPS)
Internet Speed
100 Mbit/s(Only when IPTV is plugged out)
Antivirus
Avast, Malwarebytes PRO
Browser
Internet Explorer 11
Other Info
Note: Names with slashes between two different parts mean that the left is my old desktop and the right is my old laptop and the middle is my new desktop.(Unless specified)
Ping is horrible for servers overseas in US and Europe.
New laptop:LG Gram(Not available in US) Processor:Intel Core i3 4th Gen Ultra Low Power RAM:4GB Hard Drive:SK Hynix OEM MSATA or M.2 Graphics:Intel HD
agree with Pebbly,

take the screws out of the bottom plates, remove and give a good clean out.

laptops always overheat once the dust starts to settle.

whats the laptop make and model?
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
custom build
OS
Windows 7 Professional / Windows 8 Pro
CPU
intel i5 - 3450, 3.10GHz, 6MB Cache
Motherboard
gigabyte Z77-D3H
Memory
Kingston Hyper x 8gb 1600mhz
Graphics Card(s)
EVGA Nvidia 550Ti with 3D
Sound Card
N/A
Monitor(s) Displays
BenQ XL2411T 23inch gaming monitor
Screen Resolution
120mhz
Hard Drives
Kingston Hyper X 3K SSD 120GB
PSU
Corsair CX600M
Case
Zalman Z5
Cooling
coolermaster Hyper TX3
Keyboard
Cherry ZF5000
Mouse
Cherry ZF5000
Internet Speed
Sky Fibre 26meg download / 9mb upload
Antivirus
MSE free anti virus
Browser
Firefox
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