Are there any setup or special requirements for getting the power button and power LED to work? I connected up the front panel of my case, and the power LED simply stays on, and the power button won't power the system up after shut down. In order to power it back up, I have to use the power switch on the PSU. In case it matters, I'm running Raspbian 64bit, and using a CoolerMaster MasterWatt 550 power supply. I did check the 3.3V rail, and it stays between 3.39 and 3.41.