Bluetooth not available - iMac 27 5k 10.11.4

Hi all

Took delivery of brand new 27" iMac 5k yesterday, bluetooth worked out of the box with magic mouse and keyboard working fine. Software updated to 10.11.4 as part of initial setup, now I get lightning strike through Bluetooth icon in status bar, no Bluetooth icon in System Preferences. Tried all fixes from community threads, including deletion of Bluetooth plist file, SMC reset, reinstall of OS X. Still no joy. Very annoyed! Any other suggestions from anyone?

Thanks

Ade

Has invited:

howapple - hello

Favor from:

Bluetooth is unavailable Bluetooth is offline and unavailable. Restart your Mac. If the Bluetooth status doesn’t change, disconnect all USB devices and restart your Mac again. If Bluetooth continues to show as unavailable, you might need to get your Mac serviced


.Using a Bluetooth mouse, keyboard, or trackpad with your Mac - Apple Support

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