So diagnosis service center showed that the cooling system is working properly but the problem in stability of the video card and it requires replacement of the entire motherboard. Perfectly! Awesome laptop! I do not recommend anyone buy Lenovo products, especially gaming laptops.
Man, you can replace only keyboard module. But it is very hard to do. When you disassemble your laptop you need to cut off plastic clips, and after that, you will have access to the keyboard. After replacement, you need to put back your grey metal plate and solder back these small pieces of plastic. Because I had the same problem.