Why won't my Samsung NX11 turn on?

I have a Samsung NX11 (sorry for the misleading device picture, there was no NX11 in options) which is 7 years old and while recording a video suddenly the screen froze and turned black(and doesn't turn on). I thought it might just be the batteries so I changed them and it still doesn't turn on. I feel like I have tried everything and I want to see if I can fix it myself before thinking about getting service. Can anyone help?