I changed the LCD on an A1369. Below are the highlights: 1. The screen is replaceable; but hard to find and expensive. I found one on aliexpress.com f(like ebay) for $150 was scared purchasing but it came just fine and I now like Aliexpress. 2. The LCD comes only as a glass without any screws or metal frame to screw it in the lid. It has to be taped back. 3. Backlight is fixed on the screen and diffuser papers/plexi glass sheets have to be used from the original macbook; the original owner threw them away. So, I had to buy a broken lid with screen so I can use it from there for $40. 4. You have to be careful touching the diffusers and sheet as fingerprints there will show when you have assembled the screen. 5. You need to make sure that you remove the bazel carefully; it is affixed using a double sided tape; I didn't use a heatgun but used thinner plastic cards (thinner than credit cards) to remove the bezel. I started from right bottom of the screen where I used a thin screw driver to lift the bezel and...
I did the same to my iMac. What I realized that the 2.5" harddisks generally don't get hot, especially the SSD, so I removed both the sensor connector as well as HDD Fan connector. I haven't had any problem with either so far.