My macbook suddenly not working

Hello there, I have macbook 2018, 15inch

I working on it without any problem at all but suddenly when trying to open macbook no response from it

nothing open or even no voice appear, its not responding to power button at all

also we don't have apple maintenance center on our country, if someone can help me with any reason why this happen is this issue related to motherboard and whats the possibility to repair it