Let's Note is famous for its robustness. It is designed for a long term use. Some weak point will show if you use it for a long time. The common one is its fan noise, which is very annoying. But you can fix it, if you are good at DIY. The level is 5 out of 5, the most difficult, though. Do it at your own risk!

It worked well and the noise has just gone!

1. Disassemble the PC until this.




2. Give an oil the squeeky axis or its holder.
Note: It must be smoothly spin. Don't put any dust in the holder. That's it. The noise should be gone.