LED driver is pretty cool. Here is how I set mine up. First my case came with 2 blue LEDs, I replaced one with a red LED. On my MB there was a choise for LED power or LED standby. I used standby and changed a setting in the BIOS, this allowed the red LED to activate only when in S3 and keeps it on solid(no flashing) and off when the HTPC is on. I did this because it matches the way the TV's LED works(off=red led on, on=led off) The second LED(blue) got connected to an internal comm port that the LEDSDriver controls. I set this one to flash rapidly if the HTPC is muted, flash slowly if it woke up for an automated task(recording/updates) or if it is in away mode, its off the rest of the time.