hey, today I turned on my angel ir3 for the first time in a while and it lit up for a second (blue like it always does) and then it wasn't blue anymore but it still had the little battery sighn there, and also there were no letters like there ussually are like saying "live" mode, "safe" mode, etc. why is there no letters and why does the blue light go off after a second? is it because my battery could be dead? I haven't charged the gun in a while. or is something more serious wrong with it? thanx alot.