Bootup Problem?

[GrooveNinja]

I have noticed that when I first turn on my TI on any day, it seems to boot up correctly but it does not make any sound at all. I then turn it off, and the three leds for the oscillators are still blinking. I turn it on again, and everything works fine. Subsequent reboots that day will all work correctly. Does anyone have any ideas about what might be happening? I have a very, very vague suspicion that it may be related to the usb cable being plugged in, even though I don't think that the computer at the other end is always on. I have recently upgraded the OS to 2.7.3, but I don't know if the problem was occurring before that.