You will need to be clearer about the problem. I realize that can be difficult but you need to take the time to describe exactly what you are doing and what is happening.
"I recently bought an ibuypower computer and I have had problems with starting up the computer."
Way to vague.
"I bought an ibuypower computer three months ago. It worked OK at first but the last few weeks it started not waking up from hibernation."
See how that works better?
When you say you shut it down, how did you do that? Selected "shut down" from the start menu? Held in the power button?
"....computer would not boot or start up."
This means the same thing. Booting is starting up. Did you mean POST?
Did you mean to say that when you try to start it nothing at all happens? Not even a flicker on the monitor and no noises?
I want to help you, but pulling little bits of info from you post by post will only frustrate both of us. Work on it, give me lots of information up front.