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Model A1418 / Mid 2014 / 1.4, 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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2014 iMac LCD not displaying video

The iMac I have powers on, but the LCD does not receive any video. When I boot it up, only three diagnostic lights are on. Should I replace the video card?

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Did you try an external display? I would do that as this series doesn’t use a MXM graphics board, instead the graphics is driven by the Intel CPU’s graphics engine, so that really means a new logic board here.

But before you make that jump let’s see if the external display works.

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