Chosen Solution

My friends PC hasn’t been working at all we thought maybe it was the monitor but it worked fine when plugged in to laptop the build is https://pcpartpicker.com/list/RGtQYT this includes the monitor but it just won’t work we tried methods to the monitor and checking all ports from GPU to CPU to hard drive nothing seems to work if anyone could help fix this that will be appreciated.

Sticking the ram in and back out works thank you Brett I found out my friend didn’t lock it fully

Make sure your RAM is properly connected. Take it out, clean it, and replace it. Worked fir me.

So the system turns on but no display? Have you tried different connection cables, such as VGA, or DVI on the GPU? I trust your GPU is connected properly. Try taking out the GPU, and plugging your connection cables directly to the motherboard and see if that boots.