| posts: 9,520 | Location: UK
Yeah, plug it in.
If its an old version plasma that uses a lot of power (say over 400W average), you will need to watch lots of video when not using a PC on it (ie TV, video).
This is to even out the wear patterns, PCs tend to leave static images on the screen for a long time which can burn in if done for long enough.
If its a recent plasma (within last 3 or so years) from a reputable mfr, it should be fine with just a little TV/video use.
I dont recommend the use of anti burn in tools overnight, you will wear the plasma out quickly.