Re: HELP. NEW COMPUTER BUILD PROBLEMS.
Probably the fastest and easiest way would be to pull the board out of the case, inspect the cpu fan/heatsink mount, use only one stick of memory and check that for proper installment. Use the on board video if you can do that and connect your 4/8 pin connector for the cpu, the 24 pin for the board and if you have to use a graphics card, be sure your power is properly connected to that too.
Place the board on a non-conductive surface and see if it will show a post screen when your temporarily short the pwr on (use small screw driver tip) pins together on the front panel header
You do not have to have anything else connected except the cpu/heatsink/fan, one stick of memory, power supply, keyboard, mouse monitor and possibly a video card if you have too.