Chosen Solution
Hi, everyone! I recently picked up a Retina Macbook Pro 13" a1425 to fix up. When I got it, it would only power on when you plugged in the magsafe and the fans would run on high. Since it wouldn’t respond to the keyboard, I assumed some liquid damage on the keyboard. I purchased a replacement keyboard and just installed it. Now, it doesn’t power on when you plug in a magsafe, but it also doesn’t power on with the power button. The keyboard does appear to be working though because I can perform an SMC reset (which doesn’t help). When the magsafe is plugged in, the light goes from green to amber. It will also go to amber if I unplug the battery. Anybody have any ideas?
Disconnect the keyboard ribbon cable and then use the power pads to start the system are you able to get it to startup that way? If you can carefully reseat the ribbon cable making sure it’s squarely and fully inserted. I use a small strip of electicans tape which I fold over one end to make a pull to help in seating the cable. Refer to this IFIXIT guide: MacBook Pro 13" Retina Display Late 2012 Logic Board Replacement jump down to Step28.
Can you power up the system with the battery connector unplugged?
