Question 2012 MacBook Pro 15" Keyboard, including power button not working

Arunashamal

Reputable
Jun 7, 2017
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Hi guys,
I have a friend’s 2012 MBP 15” model that is showing the folder with question mark. Which is due to a bad hard disk, I can hear it is stuck… that is not a problem.
However the keyboard including the power button is not working.
When I removed the hard disk and turned it on, it went to internet recovery mode, here the touchpad is working but not the keyboard. So I plugged in an external keyboard using USB. to type WiFi password,
But the external keyboard is not working, except for caps lock key (lights up and shows the caps lock icon in the password box, and enter key and escape (maybe some other keys as well, but not a letter keys).
Trying the external keyboard when turning on the computer don’t work either
Anyone has any idea what might be going on?