MacBook Pro extremely laggy, loud fans and Hugh CPU after “repair”

Hey,

I’ve been having problems with the keyboard for a while and took my 2017 laptop to an authorised apple repair store. Besides that it’s been working just perfectly.

They said it failed the Mac Resource Inspector (EFI), Temperature Sensor testing failed. And that it was sticky around some of the keys. To fix it they needed to change the top case and battery (900 bucks). I agreed since I need the computer every day for my job.

After getting it back they said it still failed some hardware tests and that they also needed to replace the logic board and Touch ID for 1600 bucks, then I decided not to and keep working with my external keyboard. So they put back my old top case and battery but still charged 120 for the job.

Now the real problems started, when I turned it on after this it’s unusable. EXTREMELY laggy and the fans go crazy. The cpu meter is high eventhough I haven’t launched any applications.

So from a perfectely good computer besides a couple of sticky keys it’s now unusable.

The repair store won’t take any responsibility in this and claims it’s the water damage and when they opened it up a corrosion process must have started and damaged the logic board.

To me it seems unlikely that this could have happened. Can a water damage (that in this case must have been for maybe two years) start to affect your computer the moment you open it up?

Any one had the same experience? Could it be that they just made some other mistake reconnecting the battery? It’s impossible to talk to them so I’m reaching out for help here.

I work as a researcher this is disaster for me.

Thanks in advance, would be so grateful for an answer.