Check your RAM, make sure it is seated correctly.
Check your CPU, make sure it is seated correctly.
Make sure all wired connections are properly connected and secure. (Especially make sure the 4-pin CPU power is in place)
Make sure the Video Card has an additional 6-pin power adapter with power going into it.
also forgot to mentiont there is no output to the monitor
You won't get any output on the monitor with a failed POST test.