Broken keyboard cable
If iFixit does not have the part- Have them notify you when one comes in. I did that and never thought I would get a response - but I have the part, the Mac is back. Thanks
Connects the upper case, power button, trackpad, sleep sensor, and keyboard to the logic board. Identify by 821-0404-B or 632-0369-B printed on cable.
Lifetime Warranty - This iFixit product is guaranteed to function as long as you have it.