Chosen Solution

No worries, it’s not the usual won’t boot issue. I googled for my prob night and day. Atm the book runs without battery.

  1. When I plug in the MacBook Pro Mid 2011 into a power socket it starts fine, but not due pressing the power button. There is nothing. Same for shut off. Can shut down via Software (Mavericks) but the power button is “dead”.
  2. Letters and numbers won’t respond. The function keys work and some of the “edgy” keys, enter, shift, arrows. But not the normal letters and number. I’m using an external keyboard atm. The track pad works fine. Thanks for any help. I can’t solve this issue. Tried all the common key combination magic tricks. No success. Thank you

Can you try plugging in an external USB keyboard? Does it work correctly? If it does I would suspect the Analog to Digital (A/D) logic within the keyboard is messed up. Which would mean replacing the keyboard (top case assembly). As you would need to completely treat the system down the issue is which makes better sense here trying to repair the keyboard or just replacing it. Given the amount of work and the likelihood of not fixing the keyboard I would just replace the complete top case.