Oh man...
I couldn't read the instructions that came with the cases let alone be able to tell you where to start
First task would be to find the V+, which a safe start would be 5v, and see what it is setup as currently. Cause those jumpers dictate what LEDs light up on the display. After awhile you'll figure it out.
I had my CPU display saying OC back when I had a case with one. Made another system display HAL.