Bluetooth in MacBook Pro not detected
I have 13" MacBook Pro of late 2012 vintage. Bluetooth hardware is not detected. Do not know when this problem came, but noticed it a few months back. Wi-Fi is working.
I believe there could be a hardware problem or a connection problem (In May this year I changed a defective charging port and replaced the battery myself as the service centre was not supporting this model anymore).
Any insights? Any DIY solution?
MacBook Pro 13″, macOS 10.13