Hi all, my first post here, i received my hz24wi today. Overall it's an excellent monitor, really sharp image and good colours. Compared to the digimate 24" i tried first (AMVA panel) the image quality is amazing, virtually as good as my old NEC diamondtron CRT.
But, and i'm hoping the other 24wi owners can help me here, i have a problem with it. I get banding on vertical gradients. This is an odd thing, because i get no banding on horizontal gradients such as the grayscale test at lagom.nl.
Could a fellow hz24wi owner try either or both of the following...
download checkemon and try the 'Color Spectrum' test image -
http://www.ykwong.com/checkemon.html
I made a screengrab of the same image in png24 format here -
http://img174.imageshack.us/my.php?image=colorspecpy4.png
On my screen i get bands running across the image roughly 1/2 inch apart, all the the down the image, slightly irregular spacing though.
Here's the really quite odd part, if i drag my cursor back and forth across the image, then directly below the cursor the banding distorts, all the way to the bottom of the image.
If you have photoshop, try using the gradient tool to make a black-to-green gradient. Disable the dither option, then drag a horizontal gradient, it comes out smooth. Now create a vertical gradient, for me it comes out heavily banded. If i then select the brush tool, the same column of banding distortion is below the brush, and will get wider if i increase the brush size too.
My display is connected via the dvi cable provided, at native res, and i've tested at my preferred settings and also when reset to factory default.
This is an amazing display, aside from this issue, so i'm hoping it's correctable. does anyone else notice a similar effect on their hz24wi in either checkemon, the image posted, or photoshop?
I don't get the same effect on other displays with the graphics card used, although the way the cursor interacts with the banding makes me think it's do with the 'hardware cursor' and therefore the graphics card (8800gts).
Another possibility could be the dvi cable maybe? although i'm not sure if that's possible with digital cabling. I don't have a spare DVI cable to test with unfortunately.
My other thought is the genesis chip in the display. I know dell 2407's had an issue similar to this, which was fixed in firmware by disabling some image processing done on the chip when the monitor is put in 'desktop mode'. These are all just guesses though.
Any advice or suggestions, or feedback from other 24wi users, is really appreciated, thanks.