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Original post by: Dan ,

Text:

OK, this is a very different kind of problem than what I was expecting. The display does not have any problems! This is a heat issue with the T-CON board.

Let me explain … The T-CON board is mounted just above the heatsink radiator within the main case unlike the older MacBook Pro’s which had it mounted within the lid.

[image|1764502]

So when you blocked the ventilation the board overheated causing it to loose its horizontal sync at the bottom edge of the display giving you this colorful line.

This board is part of the display assembly so if it does get damaged from overheating you’ll need to get the assembly replaced which would be an expensive repair!

So you are lucky! The overheating didn’t damage anything as it did recover. So lesson learned, don’t block the ventilation! ;-}

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