Cooling fan does not work on Satellite Pro A300

Hello world

I was asked by a friend to repair their Satellite Pro A300, because their CPU cooling fan had stopped working even during the start of the POST and the laptop could overheat and shutdown. So I thought it might one of three things:
# Fan is obstructed by dust or dirt
# Rolling fan failed
# Fan power cable was loose

So I disassembled the laptop and cleaned the fan/radiator with compressed air and check the connection of the supply, which was solid, but this does not solve the problem, so I replaced the fan and the heatsink with another that I knew worked from the same model laptop that had a motherboard fault due to the bug of password to start random bios (out of warranty) but still no joy.

I'm starting to believe that the fan was perfectly fine rather motherboards temperature of the processor or the sensors that control the activation of the fan has failed.
Am I correct in thinking that it is essentially, irreparable without specialized tools and my friend will be content themselves to turn the system off each hourish or is there something else I forget?

Thanks for any help.

Hello

I m not a technician, but for me, looks like the fan connector is working properly if you already replaced the fan and therefore, it would be necessary to replace the motherboard

That s all I can say about it having a look for second mainboard or laptop where you can get a motherboard cheap. Maybe it works. :)

Tags: Toshiba

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