Unstable green artifacts + "unable to duplicate problem" = ugh

I just posted a lengthy, lengthy rant on my blog--
http://tiffleigh.livejournal.com/93938.html
--regarding some morale-sapping experiences I've had with my G4 Powerbook (PowerPC 1.33 GHz) with TekServe in NYC, and AppleCare in general.
Their service ostensibly was "good," only they failed to 1) find the problem I brought it in for, even after seeing it with their own eyes, and 2) fix said problem.
Which is this: I started getting "unstable green artifacts" on my screen. After I brought it in and they shipped it out to get looked at, they replaced the logicboard -- the second such board they have replaced in less than a calendar year.
After over two weeks in the "depot" in Texas somewhere, I got it back and they told me they were "unable to duplicate the problem." Of course, a day later, the green artifacts returned.
I'm already ramping up to fast-track a new computer purchase because I'm so disheartened but I would still like to know for my own sake just what exactly is going on with my computer. Does anyone have any info or similar problems? Is there some unofficial rumor that Apple is tacitly acknowledging with this product that isn't severe enough for a recall, etc.?
Any and all feedback would be greatly appreciated. Thanks!

I just posted a lengthy, lengthy rant on my blog--
http://tiffleigh.livejournal.com/93938.html
--regarding some morale-sapping experiences I've had with my G4 Powerbook (PowerPC 1.33 GHz) with TekServe in NYC, and AppleCare in general.
Their service ostensibly was "good," only they failed to 1) find the problem I brought it in for, even after seeing it with their own eyes, and 2) fix said problem.
Which is this: I started getting "unstable green artifacts" on my screen. After I brought it in and they shipped it out to get looked at, they replaced the logicboard -- the second such board they have replaced in less than a calendar year.
After over two weeks in the "depot" in Texas somewhere, I got it back and they told me they were "unable to duplicate the problem." Of course, a day later, the green artifacts returned.
I'm already ramping up to fast-track a new computer purchase because I'm so disheartened but I would still like to know for my own sake just what exactly is going on with my computer. Does anyone have any info or similar problems? Is there some unofficial rumor that Apple is tacitly acknowledging with this product that isn't severe enough for a recall, etc.?
Any and all feedback would be greatly appreciated. Thanks!

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