Chosen Solution
I have a black strip of dead? pixels going vertically down my thunderbolt. from time to time it is a stripe w colors but most of the time black. I’ve tried replacing the cable but no luck. Any suggestion of what might be causing this? Is the LCD shot?
Ouch! Your LCD panel is damaged! Did you bang the panel or drop the display? Here’s the needed part: 27" Cinema Display LCD Panel (Thunderbolt), Apple P/N 661-6028, LG panel # LM270WQ1 (SD)(B3) and here’s the guide Apple Thunderbolt Display LCD Replacement
