Could it be my comp screen?

yo yo what's good everyone? I don't know if this was posted twice. The comp I'm working from is really slow. I just got my comp back from the shop, my sister pulled the cpu from it's place and hooked a wire so she could upload her pics but when she put it back the screen just stopped.

Now every time I try to put it on everything is running justthe screen is black. I checked the wire from where I have to plug it from the screen to the back of the cpu and some of the spikes (don't know what to call them) were bent. You think it's just the screen I have to change or could my comp be down.

I think you are talking about the case here, not the CPU.

But I don't really know what you are talking about. Would you be able to clarify?