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MacBook turn off when charger is unplugged (not working without it)

Hello everyone!

i had small issue. My macbook air 2017 13” is watter damaged. Current of water was very low. Laptop gets hit from right side (just for 1 second) and instantly shutdown. Now i cannot start it without charger. When i start it (with charger) charger lights normaly, my battery charging, all components are ready (volume, brightness, wifi, mousepad, touchpad everything) battery is normaly charging and when i unplugged charger laptop shutdown instantly and i cannot start. Damaging liquid was pure water. I opened mac and dry everything and keep for 3 days in rest. Status from coconutBattery is absolutly good.

I found a water damaged parts:

Top layer

Block Image

Bottom layer

Block Image

What you think about alcohol cleaning? It will help?

Solutions what i did (nothing works)

SMC reset

Replace battery (new one)

Starting up with D key (all good)

Have a nice day guys!

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This is a tricky repair! Cleaning the damage may make things worse, What I would do is use is a hot air rework station and some flux to reflow the components in the area. The reason here is the components and logic board might loose the metal connections if physically clean the corrosion off using distilled water and you’ll likely need to carefully lift the components to clean under them as well.

So… What I’m saying is this really needs a bit TLC that a person who does SMT work can do. This is beyond what you can do without risk.

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Thanks for answer Dan. What you think about alcohol cleaner? It's bad idea for connections?

We need to look at the chemistry of what the Blue/Green is, its Copper Oxide!

The problem is removing it often needs aggressive cleaner, Alcohols or other solvents won't remove it. Flux is one of the few chemicals that will and is not aggressive. But for it to work it needs heat!

Im cleaned mother board with high temp. + alcohol, board looks perfect and now i found new way in my case. When im disconnect trackpad and unplugg AC adapter, notebook keeps on battery for 3 seconds and still goes down. I think my logic board is OK.

@emol - Sadly, the charging logic is still suspect! Run this gem of an app to see what is happening CoconutBattery post a snapshot of the apps window here for us to see 기존 질문에 이미지 추가하기

Hi @Dan i completelly reinstall macOS and detailed clean logic board, now my mac goes down after about 20 seconds after unplugged charger. I found some forum posts and all answers going to SMC chip. Do you have some expirience about that? Thanks!

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