Congrats! I don't know of an issue, but the most dreaded is that once you turn everything on it fires up for a second or two then immediately shuts down. Usually it involves rechecking all the components and cables, usually by removing them and putting them back in. If it doesn't work it's usually either a memory or power supply problem, in which case you can remove all the memory and only insert one stick at a time until you can pin down if one of the modules is causing a problem.