Here's a little how-to for helping those who's got a Jaguar that will simply not turn on. (Make sure you have a game in the console, and that the cartridge slot is cleaned first, before venturing towards this.)
The parts I got for it were found easily at-
http://console5.com/store/
I highly recommend the website, good people, great prices on parts+shipping, makes finding console repair parts that much more simple.
The link that helped me and that I mentioned in the video is-
http://www.atariage.com/forums/topic/...