Solved Having Disconnected The Battery Wich Charger To Use To Try To Boost Retina Macbook 2015

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Good morning, My MacBook A1534 (year : 2015) has suffered liquide damages and the « power » button does not work anymore. Do I have to connect the USB Charger 12 Volts or do I have to use an Iphone Charger via USB in order to try to boost, having disconnected the battery, I want to determine whether it is the keyboard or the Logic Board that is not functionning. thank you in advance

Use a 5v. charger with 2A power to be on the safe side, one such as those for iPad would do. If the logic board isn’t damaged it will show signs of life as soon as you plug it in. Applying Low Voltage After Every Repair (Retina MacBook 2015 Only)