An issue with the flex cable that goes between the display and logic board. This usually requires a complete display assembly replacement, but depending on the model the replacement may cost more than the device is worth making the repair not economically smart.

Half of the right side of monitors colors are inverted.

Let me guess… this is a 13 inch 2018 macbook pro. If so, you’re the proud owner of a macbook pro that has suffered what is being called (smh) “dustgate”, in which pieces of dust and debris can get behind the plastic screen cover (that has the Macbook Pro label on it) in two places that happen to coincide exactly with the position of the two data flex cables. When the screen is open, this debris can happily sit on the cable, but when the lid is closed, the cable pulls tight against the cable guide and between the guide and cable, the debris is trapped. If you’re unlucky, the debris can pierce the flex cable and break one of more of the data tracks within. In Apple’s obsession with thinness, the cables do not plug into the screen, but rather are soldered onto the PCB within the screen. What’s worse is that the PCB is actually behind the screen, so to replace the cable means to dismantle the screen - usually resulting in a destroyed LCD panel.

I too have suffered from this situation and for the interim, my 2018 has now become an under desk mounted clamshell desktop machine. I’m also rocking a 15 inch 2015 macbook pro (i7, 1TB SSD, 16GB ram) which I got myself as a replacement (don’t tell my wife).