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Sena S20 not starting or recognized for firmware update

Dear Sena Community,

My Sena 20S has recently stopped working properly. When I try to turn it on, the blue turns on shortly. Then it flashes once again and then I get 3 red light flashes. And not else happens.

When I do the same when connected to a usb charger + cable, the blue light indicating it's fully charged turns red again. 

Tried connecting it to my MacBook Pro. But the Sena Bluetooth Device Manager, keeps saying: "Failed to recognize device. Cannot open USB[1][N]".

Tried the fault reset using a paperclip. But that doesn't seem to do anything. What else can I try? 

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