Cannot get my bluetooth to work at all

[finbarrus]

I have Linux Lite on a fairly old Lenovo S21e laptop.  Previously I ran Cinnamon Mint but changed to LL because of very limited memory. Generally it works fine, but unlike Mint, where the BT did work, I just cannot seem to get the BT up and running. I installed/uninstalled bluez, then blueman (on now) - no joy.

All I want is to be able to use a BT mouse without dongle and to connect my BT headphones.

Thanks in advance for any tips / tricks / fixes