Chosen Solution
Faulty display or the ALS is not properly separated from the display backlights by foam (bad refurb assembly). Check the display settings and untick the option to automatically adjust brightness, to see if this resolves your issue. Either way you will need to return the assembly for a replacement.
Reseat your LVDS (Screen) Cable. If that does not fix it you have a defective LCD. Good luck!
Alternative answer here. Go into accessibility settings. There are display settings there also and when I got my screen replacement I had the opposite issue: too bold, too cold, something major off, and calibration did nothing. In accessibility settings there are two checkboxes: Reduce transparency and Increase contrast. Toggle those. Then recalibrate.
