Chosen Solution

My bluetooth comes in and out of operation. Apple states it needs to be replaced, but Apple stores are closed. How do I do this myself?

Follow this guide: Mac Pro Late 2013 AirPort Card Replacement Also make sure the antenna cables are not damaged as well as check the Antenna array after taking off the metal plate in Step 11 inspect the four Coax cables underneath make sure they are firmly connected it could be just a loose connection. Mac Pro Late ‘13 Airport/Bluetooth Combo Card, Apple P/N 661-7552