i can't make it work.please help

[jellace]

hello. i am new here and I just need your help.I bought a nice case south-pak(dot)com and transferred everything I need to transfer. The first day of using it was great. The next day, I wasn't able to use my desktop since I was out.  I turned it on yesterday, but it won't start. I don't know what happened. Got so many important files there. It worked fine the first time I used it. Can someone tell me what happened or any idea about it?

[Linux711]

It is unclear whether you got a whole new computer and transfered the files or if you just got a new case. If you just got a new case, check to make sure that the motherboard has standoffs so it is not pressed up against the metal of the case. When you turn it on, do any fans start spinning? Does the screen come on?
If you got a whole new desktop computer did you reformat and reinstall windows or just put the drive from the old one?