I just brought mine in from outside. I didn't flash the firmware or anything. I was playing around with the dimmer in "forced dc mode". I was having the problem with the dimmer not working correctly, and my friend started pulling on the AC cord. Now, for some reason, the dimmer is working again. I guess we can hopefully narrow this down to EITHER the temperature causing the problem, or maybe the AC plug, or the sensor that realized the unit is plugged into AC. I heard there is a switch that can tell if the unit has the AC power supply plugged into it. Maybe if this switch is in an intermediate position instead of fully off or on, it is causing problems intermitantly with the dimmer setting when the player if is DC mode...

I don't know...

Temperature could be causing it too...

I JUST DON'T KNOW!!!!!!!!!!!