The illustrations look exactly like my 13" Macbook A1278 {late 2008}. What is different with the screenshots and your 13" A1278 {2012}?

From reading the comments here and looking at some of the Wiki's about the MacBook's, there may have been some overlaps and small cosmetic changes with the A1278 line during its three to four year manufacture life. For example. the original glass on my 13" said just "Macbook" at bottom center; when I ordered the replacement part here, the glass says "MacBook Pro". It morphed from an amateur to a Pro! :)

The worst thing about the whole tear-down procedure, was the display data ribbon cable in this step. As others have noted, It popped out of its socket on the mother board while disconnecting the lcd. I didn’t get a chance to see exactly how it connected on to the moboard . I damaged the dainty and minute ribbon end while trying to re-connect it to the wrong side of the receptacle. Duh! I feel so stupid. :(

I had to order a new ribbon cable ($14) . Luckily, i was able to plug new ribbon into the fragile moboard connector adequately, and then the lcd end, during re-assembly. This re-assembly step is made for a very small person with extremely small hands and big eyes (like someone out of Gulliver’s travels).

Excellent directions and illustrations! I was getting a black screen on both the main monitor, and no video on external monitor plugged into min-display port. Rather than replace the gpu, i elected to clean the video card and then bake it in the oven at 380f for 8 minutes. More about this on Evan’s creative YouTube video explaining exactly how to do, https://youtu.be/9vPM41ZmLos

The ribbon cable connection to the socket on the moboard is a real ##&&% as people have commented in step 12.. It’s a miracle my iMac works again. The display now looks terrific!

I am using pads with a 1.5mm thickness made by Arctic (color blue).

My original display was going bad with wide vertical lines of mis-mash showing up on the right side of screen. The display glass also had a small 3 inch wide crack near screen bottom. So I ordered new glass, and an lcd panel from ifixit.

Great directions and illustrations! The main problem I had was getting the display data connector re-attached to the new lcd screen fully (reverse, step 32).

The weird angle of the receiving receptacle, the way the cable is twisted and how bloody minute the connection is, all combine to make this a painstaking and tricky match-up. I hooked up tother end of the cable to logic board and powered up MacBook to test before re-assembly. Screen was blank. I played around with the connection further to make sure it stayed fully seated when lcd screen was positioned in display assembly and cable stretched out. After a couple of tries the display illuminated. Miracle!

Re-assembled all the parts back together and everything works correctly (except Bluetooth - I never use).