No screen visual

Question

i have gigabyte 945gcm-s2l/s2c motherboard, i have installed 2.00ghz/1m/800/86 pentium dual core processor, 1024mb of ddr2-pc667 ram, but when i starts my machine there was no visualisation at the screen and there was no connection of my keyboard, plzz give the solution to solve my problemmy email id is [e-mail]