Keyboard partially working after battery replacement

Hi, I replaced the battery in a mid mbp but the keyboard has some keys that are not working at all and were working before.

Anyone has come across this issue?

Thank you!

NOTE: after a night turned off, turned it back on, still not working, 15 minutes after being, its working. I suspect a restart will break it again

NOTE 2: without turning it off, the cmd isnt working..

NOTE 3: all keys are working. Scared to restart…

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Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question

I'm interested in the batteries temps when the keyboard works and when its not.

Is it only a few keys or the full keyboard failing? Open up the keyboard viewer so you can visually check each key: System Prefs > Keyboard > Show keyboard & emoji viewers in menu bar. Then using the menu select Keyboard viewer.

Only a few keys but at the moment, the whole keyboard appear to be working. Yesterday many keys werent and this morning after fresh restart so I can drain the battery and plug it for 5 hours (calibration) keyboard was failing on some keys. Now after it was turned on for 2 hours, all keys appear to be working and I am afraid that if I reboot it will do it again.

edits: I dont think the viewer is available in big sur?

@karen12 - The view is there ;-}

Do you see the flag in the top right of the menu bar? If you do click on it.

Oh yes! All keys are working on the viewer. At the moment all keys are working also. but it still happened to me twice that some keys arent working. I might try to reboot and see

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