I just bought a new 21ux. I tried different backgrounds and no dead or stuck pixels show. I thought to myself, ok your good. however i took a picture of my desk and cintiq for the desk setup thread and i noticed sparkling red pixels over my image. these pixels were not stationary but changed as i scrolled the window. also a red line showed across the screen. so i turned my cintiq off and on again and it stopped. it looked normal again.
however it seems at random i get red blinking pixel on a grey background. turning the cintiq off and on fixes it but not sure why this is happening. is this normal or some kind of graphics card error?