Chosen Solution
So the display on my Macbook started to flicker in pink/reddish every now and then. I hooked up a second display and everything is fine there, even when it’s flickering on the Macbook screen. From my research I guess this could be either the display cable or the inverter board? Or could it also be the logic board? Should I replace the cable first and then move on to the inverter board?`
Your display has reached just about its end of life. Time to replace it. Here’s a new one, used ones can be had for less: https://www.ebay.com/itm/mid-2009-15-Mac… Here’s how to get it off. MacBook Pro 15" Unibody Mid 2009 Display Replacement Here’s how to replace the guts: https://www.youtube.com/watch?v=_k6vJUnG…
