Are there any lights on the mother board that come on? Or do you mean the lights inside the case?

It sounds like there is no power to the mother board, or the motherboard may be dead.

Of course, there may not be any lights on the motherboard to come on, so unless you know for sure there were it may look the same. If there are lights on, it's getting power.

Without any post beeps at all, I would say motherboard or power supply issue not properly powering the mother board. Check those connections. The disk and case lights will come on anyways, motherboard or not.