I've heard of kits that can fix your Xbox 360 if you happen to get the Red Ring of Death. Do any of these work, and do they void your warranty? Are there any other noteworthy tips or tricks?
It voids your warranty if you open up the console. I've tried fixing an Xbox 360 myself by doing the X-Clamp replacement but that fix only lasted about 8 months before it red ringed again. Since Microsoft paid 1.5 billion dollars for you to have a 3 year warranty for your Xbox 360, you should just have them fix it for you for free. That is, assuming you've had this Xbox 360 less than 3 years.
I would not advise opening your Xbox 360 to fix the RRoD. Unless a lot has changed in a few years, the fixes I found for RRoD only made the problem worse. Let alone it voids your warranty. I was personally never able to get my RRoD console fixed with solutions found on the internet. And then I found that once I had opened it, Microsoft would not even touch the console for any amount of money.
This my blog about the experience, it's mostly about the customer support and UPS experience, but you get the picture: STAY AWAY
As an owner of a video games repair shop, the kits do work only for certain fixes, but they definitely won't last as long as a reflow of the board.
Consider the kits as temporary fixes for some red ring of death related issues. Any board that has the dreaded red ring of death just means the board is prone to heat and gives it a higher chance of it overheating again. If you just apply the kit fix and it overheats again, it just means it would require a reflow of the chip instead. Keep in mind it's the heat that's causing the issue, so its always best to mod the 360 internal fan to keep it cooler.
You will need to know how to solder and have a soldering iron. Here's a very good article on the RROD subject on the differences of a reflow and reball.
I know many people do their own research and find forums regarding this RROD repair topic, but I must honestly say there is a lot of false and misleading information from others that have fixed their own systems or only a handful of them. Most RROD occurrence's is different, which is why you will need to find the error code to find the culprit chip.