Fixya

This is a good site for troubleshooting...anything. You can search for a specific product or category of products, or you can browse brand names. Once you find the troublesome product, you can browse the lists of solved problems to see if any match the problem you're having. If not, you can browse the list of unsolved problems to see if someone has already asked your question, and if not, you can submit it. Someone out there knows the answer--either how to fix it, or that it can't be fixed and that all or part of it must be replaced.
Maybe you can be the expert: if you see a problem you've dealt with in the past, you can pass on your wisdom.
Everything from large and small appliances, to computers and other electronics, to video games, to cars. Especially in the case of electronic gadgets, I think there is a tendency to think of them as disposable, so if your Nintendo DS touch screen is acting up (say), you might think, well, might as well get the newer model rather than try to get it fixed. That is, unless you are unbelievably cheap. Like me. Ask my children.