|So you had Windows 7 running and then attempted to upgrade RAM. After a black screen you attempted to repair Windows 7? Is that correct? |
If so, I suggest you remove the new RAM and then run testdisk to attempt repair of the partition. Get testdisk at the link below. Be sure to read all the tutorials before using it.
If you can get the partition repaired then we can deal with the RAM issue.
You should not lose any data by using testdisk if you don't format.