This is my work computer that lives in my drawer. No wear and tear to speak of (other than opening and closing the lid). Opened the lid mid-day one day and horizontal lines completely cover the display.

If I slowly close the lid to about half way, the lines will disappear.

Only to reappear when the lid is opened again. Obviously a connection problem. This is a work computer and the repair shop quoted work $3000+ for this repair. Ludicrous. Also, no apple care was purchased so this barely-more-than-a-year-old top of the line Apple computer is suddenly worthless.

I'm not afraid to open the case, but could someone direct me to the cable that I should unseat and reseat, or perhaps even replace?

Any help greatly appreciated.