Probably you put the RAM in the wrong slots. Check the MoBo manual to see in what slots you must put it. If this doesn't work then try to insert only a bank of RAM in the primary slot (see manual to know what it is).
Try this, if it's not a RAM problem post again, I will try to help you.
The computer use to work until I updated to biso and after that I could still boot into windows 7 (without seeing the bios) but now there is nothing. Can I reset the bios to defaul any button on this mainboard.