About 6 months ago I bought an i5 9400f with mobo and memory. When we installed it we put a wrong screw in the mobo and it cracked. I managed to install windows but there were no sound input, so I checked if i had the hd audio cable in. After that the pc never started again. I then tried the cpu in my brothers mobo not knowing its a 100 series and the cpu is not compatible. Now I figured it out, is there any chance the cpu did not break with the mobo and I could just buy a 300 series mobo?