Only the late 2013 and mid 2014 models are compatible. the rest is different. If you are going to replace the logic board, make sure there isn’t any fluid damage on any other parts (display connector, battery and keyboard/trackpad, because they might damage the new logic board, especially a bad battery.
the X means that the battery is not being recognized. this can be because the ‘new’ battery is bad or the wrong model for your mac. It is also possible that the fluid damage, damaged your logic board as well, and that the connector doesn’t recognize any battery. I’d recommend having your macbook checked out by someone who can repair water damage. they can tell you what the issue is.
check ebay for displays, there are good displays for about one third or half the price apple is asking. search for it this way if you have a macbook pro retina 15”: A1398 (insert model (for example, mid 2014)) lcd assembly. hope this helps.
Hi Brian, The screen for the late 2013 is different from the mid 2012, so the communication is different as well, which explains the blown fuses. If you need a display replacement for the mid 2012, buy a screen for the MacBook Pro retina 15” Mid 2012 or early 2013 (a1398). these parts match. The Late 2013 and mid 2014 are the same and match, but do not match with other model. same goes for the 2015 model, only 2015 displays will work correctly on it.
Have you tried using an external keyboard? If it works in the external keyboard, the mechanism below the keys are most likely defect, which is fixed by replacing the entire keyboard. This is quite a time extensive and difficult repair. But if done carefully, it is doable. What might be another solution you can try since the keys aren’t working: you can take the keycap of the keyboard, by sticking something like a guitar pick under the key (check google/ifixit to see how to). Cleaning it and trying to press the mechanism without the key, will show you if the keyboard underneath the keys is defect or not.
Sounds like the SSD is broken. if it doesn’t recognize it all in any machine, replacing the SSD is the solution. Since these flash modules are pretty expensive, i’d recommend buying a second hand one. make sure you buy the correct one, since there are a lot of different models and they do not all fit.
The zzz sound? Is it like a ticking sound? Because if that is the case, it might be that there is an IC detective. If that is the case, you need to figure out which one and have it replaced. I’ve seen the exact same issue with some other mac’s.
The most common problem with the Thunderbolt Display is the cable connecting to the laptop. replacing that one might fix it. If you have a male to male thunderbolt cable, you can put it in the thunderbolt port on the back of the display, and the other one in your mac, if the screen works fine that way. It is the cable that is having issues. Replacing the cable is not that hard, but you need the right tools and need to be careful.