So i have built my son a pc consisting of a ryzen 3400g apu. A msi b450 gaming pro carbon a.c. Mobo. 2x8gb 2666mHz corsair vengeance ram. A 240gb ssd and a 1tb hdd. After building I switched on for the first time and all seemed fine
then 30 or 40 seconds later the screen went stripey. Have re...