Chosen Solution

My mid-2014 Retina doesn’t detect the battery any longer. The machine runs fine from AC. I took it to the Apple Store and they showed me a picture of corrosion around the battery/logic board connection. No one around here particularly remembers getting it wet, but that’s neither here nor there at this point as we’re way past warranty regardless. My question is whether or not it’s likely that a new battery kit will take care of it, or is it likely that there’s logic board damage? Given that everything works except the battery I’m tempted to think a new battery will get it but I’m hoping someone with a little more experience repairing these glued together monsters might have an option. Thanks!

So generally speaking, a computer that relies on AC to stay powered on has a consumed battery. It’s possible that Apple denied service for the device because of liquid damage only. However, a battery replacement may— based on the symptoms you described— solve that issue that you’re having, and is significantly cheaper than a Logic Board replacement. A few things to consider: Your model’s battery calls for a a top case replacement, or a battery replacement using adhesive remover. Both repair options are somewhat complex, but might be fun nonetheless.The reason Apple denied service is valid, in the sense that if there is indeed corrosion on your Logic Board, other issues may arise in the future. Consider your next move and let us know what you’ve decided. Cheers!

Logic board would need to be inspected carefully via microscope for liquid damagd and corrosion. Battery does sound like it needs to be replaced due to liquid damage. Could be more than that though if liquid was slipped on the keyboard meaning keyboard will need to be replaced as it’ll fail sooner or later.