Keyboard and trackpad disabled at login, keeps searching for Bluetooth

"I have not seen this issue before and not seen a 2016 machine, Let's try resetting the PRAM first.

Here's how to reset your PRAM:

Shut down your machine. Yes, all the way down, not sleep or logging out.

Press the power button and then press command-option-p-r. ...

Hold those keys down until your Mac reboots again and you here the startup chime.

Let go of the keys and let your Mac reboot normally.

That failing, try holding down the Option key on boot and go to the repair partition an run Disk Utilities.

Do you have an external Boot disk?"

"If your model is the 2015 model, EMC on the bottom will be 2835 (you have selected late 2016), try reconnecting the trackpad cable. I have seen the trackpad cable go bad on these models, and if it is not recognised, neither the trackpad or the keyboard will work.

If you reconnect it and it initially works, buy a replacement cable. It will go bad again, so just replace it with a new one."

"for me the issue is a glitchy connector for the trackpad cable.

Sometimes it works when I press down the frame between the trackpad and spacebar. Just now when I followed this guide

https://www.youtube.com/watch?v=FzcBL1NB...

I realize that the reason it works is because the connector is pressed into the socket. But then it stops again after a while. So today I removed the connector shield and added extra padding to see if that stops the connector to stop dropping out of the socket."

"Hi, I found this link and solved the problem my wife had with her MacBook Pro 13 2015 instantly:

https://joshmccarty.com/fix-frozen-track...

This is taken from the link:

“Shut down the computer.

Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.Release all the keys and the power button at the same time.Press the power button to turn on the computer.Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC”

hope it helps!"