Tried booting to Win7 install disc.... nope
How far did you get? Booting Win7 isntall disc should not take into consideration anything installed on the hard drive. It will just boot itself and will take you to a screen where you can install or repair Win7.
If there is no problem on your Win7 DVD, I think this would be a hardware issue.
"I learned a lot from repeatedly breaking my system and then reinstalling. Oh, and a lot of GOOGLE searches too!"