Hello, I'm having some trouble with my computer. I know this has been posted before, but my computer will not turn on. Well, it will for a split second, then it justs shuts back off. I know its not the PSU, because after the computer messed up, I bought a new one, but it still did not work after that, it did the same thing, turn on for a second, then shut back down. Could it be a motherboard issue?