iSight camera and optical drive stopped working, are they related?

Recently my iSight camera randomly stopped working. Green light comes on, but no picture shows on the screen. About 2 weeks later my optical drive stopped working properly. It won't read CD/DVD's, when it tries it ejects them right away.

First time I noticed my disc drive acting up was when I was trying to burn a CD. It got almost all the way through the writing process and ejected the disc and sited a disc error. Do you think these issues may be related? Software v. Hardware problems?