Bluetooth has disappeared

I have an iMac 24 "early 2009 model. I got some reception problems with my Magic Trackpad 2, I bought when it came out. I also put a 4.0 Logitech Bluetooth dongle on my stereo, and now I can listen my sound all that plays sound, just by pairing with it.

My Magic Trackpad 2 has stopped working. Probably needs a refill. I plugged in and left for work. When I got home, Bluetooth was not turned on. Menu icon says that is not available. I looked on the Apple website, and recommended a reboot. I did it. Here are the Bluetooth icon on the menu - not always available - but when I opened system preferences, there is no available Bluetooth icon. What should I do? Bluetooth can burn?

Reset the SMC (I assume that the computer has built-in Bluetooth).

I don't know anything about the dongle or how should be displayed.

To my knowledge, Bluetooth cannot "burn out."

Barry

Tags: Peripherals

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