This may be a looong shot, but based on dbtayl's comment guessing at cabling/EMI issues... I figured I'd offer that I've seen the LCD blank out briefly when I touch the metal bolt heads on the bezel with the metal of a 30-foot tape measure. (Discovered this while measuring it!) It comes right back and works fine after the ~0.25s glitch. I don't think it's static charge on me and/or the tape measure; I repeated it at a fully-grounded workstation, and with my body and the metal tape bonded to the ethernet metal shell. But *something* is weird, and I can repeat it about 1 out of 3 tries. So in the dim chance it's related, there you go.