DO NOT UNPLUG OR MANIPULATE THE SYSTEM DURING AN UPDATE. Updates for GS2 may often include firmware updates that put the system into a special programming mode. All front panel LEDs will go dark and the fan will operate loudly at its highest speed. This is expected. After roughly 30 seconds, the fan will return to normal speed. The phase LEDs will turn all red as the system exits the special programming mode and then all green when the update is complete.