What topics can I ask about here?
Please read the quality guidelines before posting.
Hardware Recommendations is a community-run website to help you find a specific product for your needs. That means you can ask for a recommendation for hardware to perform a specific task. However, you should be aware that "hardware" is not an all-encompassing term — for details of what hardware is accepted on this site, please see http://meta.hardwarerecs.stackexchange.com/questions/265/what-is-hardware. In essence, we can help you if you're looking for a recommendation for hardware that is "an electronic item that is, interfaces with, or connects to a computer to operate".
We cannot help with technical issues with existing hardware.
Please note that because of the subjective nature of recommending hardware, your question must meet the community quality guidelines - please read them before posting.
Questions asking for general advice about buying hardware are off-topic because the advice we provide can go out of date very quickly, and because they don't always lead to a product decision.
Additionally, we aren't able to respond to questions asking for technical support, build reviews, or compatibility advice.
If your question is not specifically on-topic for Hardware Recommendations Stack Exchange, it may be on topic for another Stack Exchange site. If no site currently exists that will accept your question, you may commit to or propose a new site at Area 51, the place where new Stack Exchange communities are democratically created.