Friend fell on my laptop and then when booting up the laptop kernel_task constantly running at 100% CPU usage, making the computer unusably slow. Did some research and found out it was most likely a hardware issue, so I ordered the part in hopes of it being an easy fix.
Opened up air after removing screws with ordered part and noticed the battery ribbon had come detached. So I simply reattached it and fired laptop back up. Returned to normal immediately and continues to work as it did previous to the incident.
Don't fall on your MacBookAir.