What do you mean exactly by "answering service" ? Voicemail?
Are they on the top/bottom or the sides?
All channels or only some?
What is your input source? Antenna/Over The Air, Cable, or Satellite?
I need to know these things to determine where the problem is.
If you're using Antenna/Over the Air the problem is limited to the TV, but if you're using Cable/Satellite the problem can be a setting in the cable/satellite box.
Either way what you want to look for is a "Ratio" or "Picture Size" or "Zoom" setting.
Also please keep in mind that if you're subscribed to a non-HD TV service this will cause bars to appear on most of the channels.