Usually on models with the blue blob, you can tear the block down and find the problem. It usually the "blue" lcd unit. They can be bought separately, but they are pretty expensive. No affiliation:
http://www.ebay.com/sch/i.html?_trks...at=0&_from=R40 I'm not sure if that's the exact one you need, but if not, it will be close.
To me, for $90, I'd rather find something else...