New display, same horizontal lines

I've got a new display (Apple doesn't replace the entire PowerBook in Switzerland) and the new one has the same horizontal lines.
Does anybody own an 1440x960 15" PowerBook WITHOUT these horizontal lines??
Thanks!
Andreas

All this talk about the display brings back memories of my 2000 PowerBook G3/FW. There were huge variations in the displays of those PowerBooks. Eventually I learned to cope and calibrated my screen. Still, it practically killed my interest in digital photography, as my photos mostly looked dull and uninteresting on that screen.
In comparison, the 15" issue with lines is really minor, but I admit it is there and can be seen.
I made a test that is possibly even easier to interpret than the famous "crankycat" image: http://www.cameraid.com/art/quadrants.gif
The rectangle has four quadrants. The bottom two should be the same shade even on a PB G4/15DL and on an ideal display, all four should be the same color. On the PB G4/15DL, the top two quadrants are not the same shade of gray, but the screen position determines which one is brighter and which one is darker.
If there's a difference between top left and top right, your screen is affected.

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There was this thin 2-3 pixels horizontal line appear on the displayed middle of this month (NOV 2010). It was gone after I reboot the machine.
Today is the 2nd time the line appeared, but this time there were 2!! 1 in the center of the screen, stretched from almost left of the screen to the right edge of the screen. Another line at the bottom of the screen, stretched from the center to the right edge of the screen.
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Bummer!
Apple and other computer makers buy components from a number of venders--so the display panel itself (less the housing) could well be used in a number of different computers. So this sort of problem could potentially happen with any of them. It's just your misfortune that you got a display that developed a problem.
My own experience has been that Macs have been very durable. I have a 1992 PowerBook 145B and a 1998 PowerBook G3 that both work perfectly, even though the software they run is hopelessly outdated. I also have a PowerMac G4 from 2002 that is running Leopard and is still in use. My 3 year old Santa Rosa MBP is still working without issue, although I did need to replace the battery and hard drive. Ditto with my 2004 iBook G4, and my 2006 PowerBook G4 is running perfectly with its original hard drive and battery.
A pity this problem did not occur before your warranty ran out. Does touching the line of pixels do any good? I have read that sometimes this will get them unstuck.
Not sure what your options would be in Malaysia--it may be best just to live with it, at least as long as it doesn't get worse. My guess is that you would be looking at replacing the display, although you would have to have Apple or an AASP evaluate it to be sure.
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I'm experiencing the same horizontal line issue as many others have reported.
I decided to try changing the number of colors my diplay uses from millions to thousands. After doing this, I notice a cross-hatch or regular little squares pattern instead of horizontal lines. It is epecially obvious on light grays such as the gray behind "Apple Discussions" at the top of this web page.
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I noticed the sort of textured look on the screen even before I noticed the lines. It's kind of like the texture of a polo tshirt only very subtle and finely detailed.
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New display, same horizontal lines

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