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The Speaker System Cannot Be Turned Off - Sony HT-A9 Help Manual

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Help Guide
Home Theatre System
HT-A9

The speaker system cannot be turned off.

The speaker system may be in demo mode. To cancel demo mode, reset the speaker system. Press and hold
(power) on the control box for more than 10 seconds.
5-025-234-11(2) Copyright 2021 Sony Corporation
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