iMac (late 2009) 27-inch vertical streak on the right side

iMac (late 2009) 27-inch vertical streak on the right side. Oddly enough it is still there even on the gray splash screen. How much is it? I tried restarts it, Vpram etc, but still there. Always in the same place. Is a graphics card out or the display itself. Should I make an appointment with an Apple Retail Store?

Strange, strange! This mysterious line disappeared miraculously se today!

I am delighted, but at a loss for why it appeared and why he disappeared.

The only idea I have is THAT HEAT could have something to do with it.

I look forward to any comments on this mystery.

Tags: Mac

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