My Mac Mini 2014 goes wrong recently. I don’t know whether its releated to the recent OSX update. Without any sign, the screen would blur as the image bellow.

The keyboard and mouse has no response. Then, there is a lot of fan noise, and later the screen goes black and then the system is rebooted.

It was able recover after reboot. However, after this issues happened server times, It cannot recover now. When power on, the fan keeps making noise, and the screen is black. There is no signal in the monitor.

It this a graph card issue? Can i fix it by replacing the logic board?