After purchasing my new sony S790 blu ray player, I noticed on the home screen, which is nearly completely black, some green flashing pixels when viewed up close. I cant really notice it from a distance, and it has never interfered with normal viewing. Had a quick google search and found that by reducing the brightness a few notches these flashing pixels are nearly completely gone. I need to use my spears and munsil disc again with my new blu ray player, to see if my brightness and contrast are set ok. Is this normal for a plasma? or is it a defect?