I've had my laptop for a few years, and for about a week now when I first switch it on the fan runs at full speed. I immediately restart the computer and the fun runs as normal.I don't suspect overheating or problems with dust since it runs full speed as soon as it's switched on but not after a restart. I've not left it running full speed for very long to see what happens - too annoying. I usually restart straight away.
Do these laptops have dew sensors or something? I suppose the house is cooler just now.
I doubt it’s sensor issue or something like that…
The cooling modules are controlled by BIOS. The fan table which contains all the details about cooling module functionality are stored in BIOS and I would recommend settings the BIOS to default… firstly…
So start the notebook, press F2 and access the BIOS.
Then press F9 in order to get BIOS default settings… then save the changes and exit the BIOS.
Of course the cooling modules should be checked if the cooling grilles are not clogged…
Dust is most a reason for such symptoms…
Removing dust using compressed air spray might be helpful in your situation…
Thanks for your help with this so far. I reset the bios as instructed ( I had to use esc instead of F2 though) and this made no difference. I will borrow some air duster from work tomorrow and give that a try.
I just wanted to clarify something which may help with any diagnosis: It is only the fist time I power on the laptop each day that I get this problem. I had the computer on several times over last weekend and the fan was okay apart from the first time I switched on in the morning. I immediately restarted and the fan was okay and was okay on subsequent power-ups.
I left the fan running full for five minutes or so today and all that happened was that the laptop felt really cold.
Blew the laptop out with air duster. Didn't see any dust (until recently the laptop was hardly used and it's kept fairly clean). Next two times I switched on, the fan ran at full speed, immediately restarted and fan was okay. So not dust or BIOS. Anything else I could try?
Properly the thermal grease must be renewed… So the heat can’t be cooled from fan properly.
But before you renew the thermal grease you should ask an authorized service provider which one is the right for you because there are different thermal greases on the market.
Alternative the thermal grease can be renews from ASP directly.
In worst case it’s a malfunction of fan or fan control itself. Therefore you need spare parts and it must be checked from professional people.