A big word of warning.Dell is sometimes using non-standard cases/PSUs/screw holes which makes it impossible to update/change the motherboard.As for whether it is a sweet time to get a new computer now? Hmmm... I think the prices are extraordinary reasonable nowadays if you are building your own computer (which tends to be a very easy thing to do). Most of the components are currently in a state where they can hardly drop their prices anymore.May one inquire what your current computer is?ps. Is the PSU fan turning on? Your current problem description sounds like a PSU problem. Could be as little as a blown fuse inside it... though changing the fuse by oneself is not recommended. If the error can be tracked to the PSU (by using a PSU from another computer)... getting a new one (after seeing that it would in fact fit in the Dell case) should be rather cheap and easy.