For owners of Sharp UE630X TV, do you guys find any dimness on the 4 corners when it is total grey background? Normally when you TV is on standby mode and when you first then on.

Is it because this is where the led is situated? It's not really noticeable once the picture turns on though.

I'm wondering if it is normal or is there some defect?

Thanks will try

Ok I've checked using your test video. On green, red it is not so noticeable, but on grey scene it is uneven and can see led light bleed.

I also noticed it on my HTC One M8 hand phone though. Does it mean it is defective or it is the character of the led backlight?