Bluetooth speakers quit connecting

Mar 29, 2018
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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