Please help me out with NEC LCD 1760nx!

Hello everyone. I recently bought NEC LCD 1760nx. The monitor is great, but has one issue I don't understand. After it wakes up from stand-by thin moving and flickering lines begin to occur all over the screen. They are differently coloured depending on the background colour of the spot on which they show. Blue, yellow, red, most of the times they are thin but I've seen some thicker ones. And this ONLY occurs if I'm at 32-bit colour mode. Also when I change the colour mode to 16-bit and/or back to 32-bit the lines disappear. So I wander what could cause these lines and how can I fix this. Please, help me out here, cause the guys in my local retailer of NEC don't know anything about this kind of problem. I would be grateful.Thanks.