Mid-2012 Macbook Pro, blue tint to screen, replace Intel HD Graphics 4000 1536 MB?
I have a 13-inch mid 2012 Macbook Pro. A week or so ago it started to have a display issue. The screen would flicker and take on a blue tint, sometimes jumping back to normal, then back to blue tint. Over the past week it has sometimes had a normal screen, but the majority of the time it has the blue tint. I understand it is likely a graphics issue. My Macbook has the Intel HD Graphics 4000 1536 MB. I'd like to replace it if possible but I'm getting some conflicting information that perhaps it is built into the CPU and can't be simply replaced. Is that true? If it is true that I can't just replace the graphics 'card', what part does need replaced and is it worth it considering the computer is 13 years old?
Also, any other possibilities on what the problem might be? I've checked the calibration and it says it is calibrated. I've tried manually calibrating it and only get worse results than the blue tint.
Thank you!