Aurora r4 LEDs not working

Hello-

I have had my r4 for over a year now and it was working great for most of that time.  Three months or so ago I opened it up to install a card reader.  Functionally, the computer is still just fine, but ever since I opened it up, the LEDs have been inoperable.  Obviously I did something by mistake while I was in there.

The situation is that the front panel lights turn on white (with maybe a slightly purplish tint?) and stay that way whenever the machine is powered on.  The side panel lights do not light up at all.  In the Command Center, whenever I try to load a lighting profile, it's telling me that the chassis is not being detected on the system.  

I assume that I either damaged or just unplugged the LED controller from the motherboard, but I can find nothing obviously wrong when I look, nor can I find a clear description of how things should be hooked up in there online.

It hasn't been a huge deal since the computer works fine, which is why I procrastinated on coming to you guys with the problem, but it sure would be nice to have my LEDs working again.  Can anyone help me out by telling me what needs to be connected to what in order to make sure those lights can be detected by the system?

Thank you in advance.