After modification, no screen

[gazwsx]

I just combined my new computer with the help of a friend.
However, there is the problem that when I start it gets me on the screen, but blank, and it says no beeps or anything. Light on the mother board lights, blowers running, and light on the front panel lights too.

I've checked everything after that is sitting in as it should. It will just say this is the first time I assemble a computer, and my friend who helped me had made it 2 times before.

[JAMES_911]

You must check your power supply. I doubt on that only.

[gazwsx]

Ok, I had seen there were 2 power supplies to the mother board .. has been fixed now ..