Chosen Solution
After I replaced a faulty right speaker in my MacBook Pro 15" Mid-2014, the internal display went awry. The screen is distorted, visually squeezed to the left-third, is fuzzy like static in an old TV. What works: External displays work. Both HDMI and DisplayPort. All other functions, like airport, keyboard backlight, FaceTime video, and all work. What I tried: I’ve reset PRam, SMC. Tried safe mode and recovery.Cleaned any dust/dirt away from connectors with dry, soft toothbrush One of the steps says be very careful not to touch the cable connector after removing it. Could it be that I did, and this is the result? I’ve tried reseating it several times and I see no change. Do I need to clean it, with what? Images: Login page. Internal display glitched. Functioning external display (in mirror mode) above laptop.
The display connector looks clean. What’s a cheap/easy way to clean it more?
Issue will be screen related or logic board related. Try a test screen and take it from there. Did you disconnect the battery before disconnecting anything else? Chipped the LCD cable pins when reconnecting it into the logic board? No dirt or dust inside the LCD connector?
