Faint white line (brightened line) along bottom of display

My computer (bought in Oct. 2004) has suddenly developed a faint white band starting at the bottom left of the display and running across the bottom of the display. It looks as if the backlight is brighter in the area of the band. The band gets fainter as it goes across and is pretty much invisible by the time it hits the lower right corner. The band is about 1/4 inch wide (tall) and doesn't have sharply defined edges.
On searching the forum, I found the following locked thread that seems to address this issue:
http://discussions.apple.com/thread.jspa?messageID=975713
On reading the thread, however, it was not clear to me whether this problem falls under the iMac G5 Repair Extension Program (http://www.apple.com/support/imac/repairextensionprogram/) or indeed whether a definite solution has been found.
Has anyone had this problem and had it successfully resolved over the long-term? (Some posters in the locked thread had various components replaced but then the problem recurred.)
Tom
iMac G5 1.8 GHz 20" (1st Gen) Mac OS X (10.4.5)

Thomas this was a problem some time ago, and surfaced together with a different problem of faulty capacitors on the mid plane board. Removing the back cover look at the small silver capacitors and check that they aren't bulging or leaking. This flaw prompted the repair programme, and appears as broken or distorted images on screen. You should call Apple.
The bright line on the screen seems to be screen problem alone, a larger thread is at: http://discussions.apple.com/thread.jspa?threadID=197559&tstart=270.
My own IMac has worked perfectly (good caps) but had the bright band issue. The screen was replaced and for a few months was fine, but the bright band (as your excellent pictures) returned. I should call Applecare again, but haven't yet.

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