So, first thing is to try connect via hdmi an external monitor. If you still don't get any image then there are high possibilities of gpu problem. Is you get image then check your cable that connects your screen to motherboard, if this cable is ok, then you night need a new lcd. If you don't have experience with opening a laptop then you should ask help from a technician to avoid further damage or even damaging the motherboard.
2 
Hello Arek, is the laptop still on? Are your fans working? Did you try force restart with power button?
由 ilias diolitsis 完成的
Laptop is on, fans are working, but even after force restart its not showing anything.
由 Arek Mazur 完成的
So, first thing is to try connect via hdmi an external monitor. If you still don't get any image then there are high possibilities of gpu problem. Is you get image then check your cable that connects your screen to motherboard, if this cable is ok, then you night need a new lcd. If you don't have experience with opening a laptop then you should ask help from a technician to avoid further damage or even damaging the motherboard.
由 ilias diolitsis 完成的