My HP Envy dv6 7245us had a broken cooling fan, so I purchased one off eBay. After installation and putting the laptop back together (best attempt) the screen no longer lights up. This wasn't an issue before. I am guessing I forget to re-plug in some cord ...does anyone know which cord controls this function? I have an HP manual that I used in disassembly, so if anyone knows the name of this cord and in what stage it's reconnected (i.e. system board) that would be of great help. Thanks a bunch!!! -Jeff