Media Dock

[cplum]

I could not charge the battery on media dock yesterday (XP SP3). I plugged directly into the USB cable today and it worked. Put it the cable back in the dock and it worked today. I thought the cable was secure in the dock, but my only guess is that it was not. However my screen still goes dull on the media dock when plugged in via USB but not when plugged into the wall. Anybody else seen this? Is this normal?

 

[medicTHREE]

Normal. Part of being connected via usb.

 

[cplum]

Is there a reason to go dim on USB as opposed to wall plug?