Chosen Solution
Hello everyone, I have MacBook Pro as mentioned that hasn’t been working couple years. I finaly decided to try to repair it. The issue started appearing with keyboard problems the O key and V key started to acting up, later on the space bar. Then the power button worked only sometimes, but now I can’t turn the laptop at all. I googled a bit, found some advice, press some buttons before start, disconnect the battery and reconnect which should start up the system, nothing worked. So I just wonder wether there is a way to diagnose if the problem is the faulty keyboard, logic board or both … Would appreciate any help. Thank you :) Update (05/05/2019) Thank you everyone, especially to mayer - very helpfull reaction. I can confirm it’s probably keyboard water damage as you mentioned (laptop start up when I disconected battery and hooked up the charger) - no moisture spilled, but I realized it happened after I left my laptop in basement over night with high humidity. Will buy new upper case and try to use my DIY skills :D - looks a bit scarry but it’s nicely described. Thank you again and have a nice rest of your weekend. Radim
This sounds like a liquid damaged keyboard to me. To test if the logic board is involved, hook up an external keyboard and mouse and see if they work correctly. If so, then you can either replace the keyboard (cheap but lots of work) or replace the upper case. MacBook Pro 13" Unibody Late 2011 Upper Case Replacement Here’s a video on replacing just the keyboard: https://www.youtube.com/watch?v=kz7qt53G…
