Gildstar

Right so i know this is my first post but i was told about this site and thought i'd only use it when i really needed help and this is that time sadly ... Just built my first rig and all went brilliant took only just an hour or so and grounded myself , used a wrist strap and was careful with all of my components, sadly around 20mins ago i decided to fire it up and Try install w7 but this is where my problem start's , so i put it my mini HDMI to HMDI plug it into my monitor and the power cable into my psu and fire it up , all fires fans spin and everything but nothing atall comes up on my monitor just has a blue screen ( Default screen ). Parts : ASUS P7P55D-E LX P55 - motherboard Gigabyte GTX 460 1gb - GPU Intel i5 760 2.8GHz - CPU Corsair 4GB (2x2GB) DDR3 1600MHz/PC3-12800 - RAM 2x 1tb Samsung F3 - HDD 700W coolmaster silent - PSU All help will be a appreciated , thank you.