I've seen in b&hphotovideo that marshall V-LCD70P-HDMI monitors are discontinued, but are updated versions named V-LCD70XP-HDMI. I suppose they had fixed the hdmi problem with false color (but I'm not sure). Also adds new features:

"the '70XP' adds several convenient new features: manual gamma adjustment via the menu, image flip, adjustable on-screen markers, and the ability to place 1/4-20 threads on any side of the monitor for more flexible mounting."

Yes Carlos this update fixes the false color problem over HDMI. I recently emailed Marshall in the USA and this was confirmed.