I purchased the Iiyama monitor, the first was returned due to backlight bleed it appears to affect the top right of the screen. Sadly no tweaking of the settings could reduce the bleed to satisfactory levels and therefore the screen was returned.
The replacement was much better, unfortunately, the retailer sent me the same monitor but in White! It looked quite good, however looked too out of place with the rest of my setup. Therefore this monitor was reluctantly returned. It's a shame because the picture was far better with only minimal backlight bleed.
My third Iiyama monitor I now own, quality wise is in between the two, not as good as the second which is gutting. I have opted to keep this monitor since messing about returning the screens is a pain and the positives, the overall picture is excellent, games such as Arma etc, look brilliant, it's just dark scenes in movies or a dark desktop wallpapers etc, that you notice.
Regardless of settings I have only been able to reduce but not eradicate the bleed in its entirety - I have tried several! It appears that it's the case design, for example, when you apply gentle pressure to the affected area the bleed reduces etc. The good news none of the three monitors have had any dead pixels or colour temperature variances.
It really depends if you are prepared to either take the chance of obtaining a good monitor, alternative, accept a degree of bleed (out of three monitors all three had bleed of varying degrees) an and you may be lucky - it is a good monitor and such a shame that there is a common problem. If the screen had no bleed, it would be superb.
Apologies for not answering the original posters question.