Why can't my computer see the images?

Out of nowhere my computer's screen turned black cant see anything when first starts up.?

• and it says no signal. and its like on standby.i cant even see the vista thing in the beginning and i cant see the log in page either. i cant even put it to sleep. a few days before i scanned my computer wit AVG and found a few trojan horse viruses. and it got rid of them. and a few days later this happend. soo could anyone please help me? i would greatly appreciate it. :D

• Answer:

  Hi,ralf There are 3 step to repair computer starts up black screen error I had the same problem, My friend helped me fix it, he is a computer expert. He told me a very good way. I use this method also fixes a lot of common computer errors, I think you should try it, you only need 3 steps to fix computer starts up black screen error: 1: Download a computer starts up black screen error repair tool and install it. 2: Open computer starts up black screen error repair tool and scan you computer for free. 3: Click fix button and you done. Enjoy it. Download the top computer starts up black screen error repair tool here:http://www.RepairErrorTips.com/ttfix-computer_starts_up_black_screen_error-zz0001