Based on the pictures you provided, I think it probably does require one. I don't see an SMPS on the main board. A more detailed picture of the large circuit board, especially the area where the AC power goes in, would help. Remember that running a monitor that needs an iso without one will basically destroy it, but running one that doesn't need an iso with one won't cause any harm, so best to go safe here if you can't make a for-sure determination and use one. "Double isolation" is also not generally a problem.
Also, please don't bump lots of old topics to cross post the same thing.