Bluetooth speakers quit connecting

Mar 29, 2018
Bluetooth Logitech Z337 speakers quit connecting to my Dell XPS 8900 for no apparent reason. Since then other speakers and headphones have stopped connecting. I removed Logitech from devices in Settings and now they aren't found. My Iphone 7 still works fine with these speakers. I have tried everything I can think of and everything on internet and microsoft's web site. Any help appreciated.---Dan