Hi 2pxbTony
I'm waiting for my 3rd iMac 21,5" i5 exchange. The 2 computers had serious yellow screen issue. The first had also another major problem with video card and was playing Xmas tree. The second had an hard disk issue. I just can't explain why Apple does release such "poor quality" products.
I'm fully disappointed and if the 3rd one is not perfect, I will ask for a refund.