Worked well at first but now dead

Purchased 10 months ago. Worked well to connect via bluetooth to kitchen speakers. Sound quality was good. Bluetooth connection was usually reliable. Then about a month ago the bluetooth stopped working so I connected to this little amp with a 3.5 mm phono/RCA adapter cord. Then today the amp stopped working as well - no sound at all. I believe the amp has died since the power supply brick is still working and provides the correct voltage. It should have been more reliable. Disappointed.

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