24" iMac Thin darker line on the screen - dead pixels ?

I have a 24" BTO iMac with 3,06 and GE Force 8800 GS, delivered last year in June.
Was very happy until today, when i remarked, at +/- 7 cms from the right edge, a thin line, extending from top to bottom, and seeming to expand a bit in a blurry way in the middle.
It shows much more in when on a dark background.
Could that be dead pixels ?
I guess I have to ship the machine back to an ARC ?
Or is there some test I could try first ?
Message was edited by: Claude Cauwe

A screenshot would not including any effect from a physical screen defect. For the computer, the pixels are there and working properly.
If it appears to be blurry, it may be something casting a shadow between the LCD and the backlighting. Dead pixels are distinct, so there should not be a blur between where the pixels are working and where they are not working.
In any case, since the Mac is still covered by the one-year warranty, you should probably have it looked at by an Apple authorized repair place

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24" iMac Thin darker line on the screen - dead pixels ?

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