Unfortunately, we do not offer global warranty on our products.
Since it is still in the 30 day return period for Amazon, we suggest you return the defective unit to Amazon for exchange/refund. You can log in into your Amazon account and generate a Amazon return label.
Unfortunately, we do not provide technical manuals to end users, you can contact customer support for assistance.
If you open CD or MP3 files to listen to music, the is stereo format does not support 5.1 channel.
If you listen to DVD music, the music format supports 5.1 channel, do not forget to switch to 5.1 output in setting.
We appreciate your feedback for your Genius product user experience