I have a 2015 MacBook Air 13. Right after I let it sleep and reopen, I can't type the password as it only beeps when alphanumeric keys are pressed. It also beeps when escape, space, delete or arrow keys are pressed.
It doesn't beep for keys like control or command, nor for the power button. But I can't even turn off the computer since holding down the power button for a long time doesn't do anything.
Previously the computer had an SMC problem and now I can't let it run out of battery to restart it. Any help appreciated! (The SMC problem was that when it run out of battery I couldn't restart it again without doing a power cycle by unplugging the battery. So now I never let it die.)