Toshiba satellite C855-JKL blinking screen backlightq

Hello,
I have a problem with my toshiba satellite laptop. The screen turns off randomly but I can see a very faint display of what the screen should be displaying. Also backlight turns on and off when I do not even touch the laptop so I do not think it's a problem with the cable from motherboard to the screen.
I replaced the screen to matte but the issue is on both original screen and the new one.
Any ideas what should I do?