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Sennheiser RS 220 when trying to power on headset LED goes to blue then to red within 1 second. Documentation does not address a red led. After red led goes out and power button is not responding unless I open battery cover and reclose. Then power button cycles blue/red/blank again. Unit is new out of box. Thanks for any help.
The red LED indicates the batteries are dead or there's no power. They do not come charged and must be charged for 16 hours prior to use.
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