Please try the following to resolve your issue:
- Make sure your system is connected to a working AC (mains) outlet.
- Make sure you are using the Bose power supply that shipped with your speaker. While the speaker can be physically connected to other power supplies, the Bose power supply is recommended for best results.
- If you are using a surge protector, try plugging directly into a working wall outlet.
- Make sure both ends of the power supply cable are firmly connected.