the old cooler start when bios start then goes off after the boot, and now i change to a new one but the same it start in bios but after the boot it goes off
it is fan socket problem or some transistor dont give power to the fan?
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if you know how to disassemble your laptop then you can see if the fan is just dirty or disassemble the fan and clean it.if it not work change the fan.
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@serafin garcia, "now i change to a new one" shows you the importance of reading the question before trying to answer.
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see if you can post two high res images of your logic board (front and back) Acer uses a APL5607 as a fan controller. It might be possible to check that out.
door oldturkey03