When my 360's DVD Drive up, and just stopped working, I just left it alone and not too long ago, I got the part to fix it, and it has yet to work...
But that's not the point, my uncle's 360 is now doing the exact same thing ONLY after I started putting in my HardDrive on his 360 since he left his at a friends...

Can the HardDrive(HDD) really effect the DVD Drive's functionality?