How do I get rid of the terrible banding on IPS (PremierColor) M4600?

I bought an old, battered but perfectly functional M4600, primarily on account of the IPS Premiercolor display. The display has awful banding - visible not only in photos and movies, but also on Windows title bars and such. Tried all manner of drivers and settings - and everything seems to be in the right place -, but to no avail. Any suggestions on how to get rid of this?

I owned a Dreamcolor 8770w and I had none of these issues.

 

you will have to replace the screen

 

install premier color and try change the gamut to default/full?

 

Thanks. Have tried. The pattern changes but the banding is still there.

 

You mean irregular banding in gradients that should be smooth? I experience that even on a brand-new IPS desktop monitor (though not PremierColor). It is not so severe as to be noticeable in photographs, though.

So far, I have reckoned that only proper calibration would really diminish that.

 

Could it also be a partially faulty display cable, perhaps?
Since the machine is ‘battered’…

 

I just have, in fact - with a brand new one (otherwise very similar in all parameters - all the many series and other numbers on the back - to the old one). Same problem.

I have taken an admittedly poor picture to illustrate the banding problem: https://drive.google.com/file/d/0B3WPiYtQq6RrRlBHS1dFV191NWs/view?usp=sharing.

Check out the Windows menu - but it's visible under many other circumstances. The display seems to have a problem with shades of gray and light blue, often displayed as light pink.

I have calibrated the display (now, displays) under most factory settings (full, default, sRGB) with a Spyder4. To no avail.

Could be, but I doubt it. It's battered - probably an exaggeration - on the outside. The cables look intact (and the bezel was never opened prior to my changing displays). No other signs of bad cables, either.

Frustrating...

 

I believe the blue background especially shows evidence of very poor color resolution. Or does it look as intended?
It’s quite unlikely that the display as such is the culprit here—especially since you have changed it anyway.

 

I took another look… I now see clearly on the menu what you mean. And while I’m not familiar with the innards and specs of M4600 (being a Precision newcomer), I would qualify this from general perspective as a possible hw defect in the graphics card that’s driving the display. (Since your change of the display ruled out a fault in the LCD’s driving electronics, methinks.)

 

I am relatively sure it's not the video card, since it outputs correctly on an external display (hdmi). I now wonder whether both of the displays - the original and the new one - are not, perhaps, defective. Their codes match very closely (if I interpret some of them correctly, they were both produced in March 2011, a few days apart), so they might have come off the same bad batch. I know chances are slim, but this seems a more plausible explanation than any other I can think of.