Hello... 1) set your monitor for the type of cable plugged into your MB for display.
2) try re-setting/clearing your MB BIO's for default settings, and memory testing and setting mode.
3) try re-seating your ram sticks.
4) check power connections to the MB and CPU connector.
5) make sure your CPU fan is connected to the CPU_Fan connector on the MB.
6) make sure you have power to the Power Supply and it is turned on.