For any of you suffering from warranty issues while a product is/should still be under warranty, you may want to read up on this act.
It states "that a company that doesn't provide successful warranty repair for any product must provide a new replacement or full refund, and pay court costs for consumers who must sue to exercise these rights."
If a manufacturer can't seem to get the problem fixed, you should include this act in your email to remind them of your rights, and their responsibilities.
This goes for automobiles, PC's, A/V equipment - basically anything that has a written warranty.