Black screen

sunny13 Posts 1 Registration date Tuesday November 13, 2012 Status Member Last seen November 13, 2012 - Nov 13, 2012 at 02:54 AM
i got a problem, i tried to install windows 7 over xp on moj 32bit laptop hp compaq 615 and i didnt know that it wont open. and now i cant boot or anything similar (because we installed over usb because i cant read cd/dvds) would it help if i instal windows xp, and how can I install it because when i turn on the computer i have a black screen and i cant do anything.