My Mac has developed 2, 1 inch wide white lines vertically down either side of the screen. Is this the end?     lines

My iMac has developed two 1 inch wide white vertical lines down either side. Is this the end? Or is there a fix?

LornaDer,
Run Apple Hardware Test in Extended Mode, you probably will need to run the test 2-4 times as errors do not always appear on the first pass. If you get errors then that indicates you have a hardware issue and need to take the machine into an Apple Store or AASP to be professionally diagnosed. At that point you can then determine your options.

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