Power supply or battery problem after damage

[ysmivkata]

Hi I have a MacBook Air A1466 (early 2014) and after water damage I have the following problem:

The computer does not start when I press the power button, but if I have not connected the charging cable and unplug the battery, then connect the charging cable again, the computer starts by itself. Then everything is fine and working well until I shut down the computer. With a restart, the problem is not there.

The Power button is not damaged. When I am at the login window, the charging cable is plugged in and I shut down the computer, I can normally start it with the power button. But only with the charger cable plugged in!!!

When I am logged into my account and then shut down the computer, it will not start when I press the power button, whether or not the charge cable is plugged in.

Then again I must unplug the battery and connect the charge cable.

I already cleaned all the parts with Alcohol.

Maybe someone has had the same problem and can help me.

Is it a motherboard problem or the small part where the charging cable is connected to is damaged?

I also tried to reset the SMC, which seems not to help.

Thank you so much for reading and excuse my English.

 

[Newtons Apple]

Sounds like it is time to let Apple take a look at it.

 

[ysmivkata]

The apple authorised reseller near me wanted 900€ for the repair. Unfortunately we still don't have a Apple Store here in Austria
I can use it like this. It's not a problem. I just should never shut it down or let the battery goes empty.

But it will be nice if I can fix it somehow.

 

[ysmivkata]

Nobody have an idea? I did a video for better understanding of my problem. Thanks.

https://youtu.be/nTqxqGqDrRk

 

[cyber16]

Magsafe i/o board is the likely cause

 

[ApfelKuchen]

The problem with liquid damage is that it can get worse over time - it can trigger corrosion that continues long after the water dries.

When you press the power button as you did in the video, you're putting the Mac to sleep, you are not turning off the power. Based on what I see, your machine is not waking from sleep. That's an important distinction. What happens if you continue to hold the power button (both for shut-down and for start-up)? https://support.apple.com/en-us/HT201150

As that article notes, if you have trouble waking from sleep, reset NVRAM - https://support.apple.com/en-us/HT204063

If you click the battery icon in the menu bar, what does it tell you about the battery condition?

Have you run Apple Diagnostics? https://support.apple.com/en-us/HT202731

The fan's behavior is probably meaningless. It's thermostatically controlled. With the cover off, the machine is getting more ventilation than usual.

Are you leaving the bottom cover unscrewed, or did you just do that for the video? If you are leaving it unscrewed... It's metal, there are circuit boards exposed, and the device is powered on. That is an accident waiting to happen. You might create a much larger problem than currently exists.

The battery cable and connector are not designed for frequent use. Eventually you may do damage to the cable, connector, or circuit board.

When you got that 900€ quotation, had they actually inspected and tested the machine? If they did, what did they tell you needed to be replaced? If they hadn't inspected and tested the machine, they're just giving you a standard worse-case estimate for liquid exposure.

Finally, if you were doing this to keep a 2009 model running a year or two more, then maybe the inconvenience and risk may be worthwhile. But a 2014?? How many years are you willing to live with this situation?

 

[ysmivkata]

First off all thanks for your replies!

@cyber16: I ordered a new I/O board. I'll give an update as soon as possible.


@ApfelKuchen:

1. I know that liquid damage can get worse over time. I just hope it will not

2. When I press the power button, also with ctrl key pressed it turns immediately off. I don't think I'm putting the Mac to sleep. It's more like when you press the power button for 5 sec. to force it to turn off. Also if I close the lid the Mac goes to sleep, right? Than it will wake up normally.

3. I already did a NVRAM reset - didn't help. Also Apple Diagnostics says everything is alright. The battery icon is normal - no warn symbol. I can use the mac on battery with no problems.

4. I'm not leaving the bottom cover unscrewed. I don't have to because I can use it with the battery or charger. I just should never shut it down. Restart is OK.

5. I don't think they knew what the problem is. That was surely a standard worse-case estimate for liquid damage.

And finally I don't want to live with this situation. That’s why I'm asking here for help

 

[ysmivkata]

So I replaced the I/O Board with a new one with no luck. The problem is still there