First thing I would check is if you have the stand-offs between the case and the motherboard in the correct places so there is no chance of a short circuit.
Then check the ram stick(s) and Graphics card are fully into their connectors. The 2 side catches on each ram socket should snap into place when the ram is all the way in.
Also check that all the necessary power plugs are correctly connected too.
Then check the ram stick(s) and Graphics card are fully into their connectors. The 2 side catches on each ram socket should snap into place when the ram is all the way in.
Also check that all the necessary power plugs are correctly connected too.