The empeg is designed to work flat out, all the time. Burn-in on the display can be an issue, so if you're leaving it on 24x7, then select a visual that moves about a bit. The track info visual will soon move about very slightly (ie the whole lot will shift up/down a pixel from time to time) to minimise burn-in.

In the very worst case, a display board swap is fairly painless, but you generally only notice burn-in on inverted displays, which there aren't many of.

Hugo
ps: We just got some new visuals... oh, you're going to love these... ;)