Onkyo TX-NR686 user manual

Yes, the Onkyo TX-NR686 AV receiver does have built-in Bluetooth functionality. This allows you to wirelessly connect and stream audio from your compatible devices such as smartphones, tablets, and laptops to the receiver.

There could be a number of reasons why your Onkyo TX-NR686 receiver isn't working. Here are a few possibilities:
1. Power Issues: Check if the power cord is properly plugged into a working outlet. If there's no power at all, there could be a problem with the power supply.
2. Incorrect Input Mode: Make sure that the receiver is set to the correct input mode. If it's set to the wrong mode, it won't play any sound.
3. Incorrect Settings: Your receiver has a lot of different settings, and it's possible that some of these have been incorrectly adjusted. You may need to reset your receiver to factory settings to fix this.
4. Compatibility Issues: Ensure that all the components that you're trying to use are compatible with your Onkyo receiver. Some components may not work at all, while others might work but not as expected.
5. speaker Wires: Check the speaker connections. Loose or poorly connected wires can cause sound issues.
6. Overheating: If there's not enough ventilation around your receiver, it can overheat and shut down to protect itself.
7. Firmware: The receiver's software may need updating. Check the official Onkyo website for the latest firmware updates.
8. Hardware Failure: If none of the above solutions work, it's possible that there's a problem with the receiver's hardware. In this case, you would need to get in touch with Onkyo customer service or a professional for repairs.
Remember that diagnosing the issue might take some time, so don't get too frustrated if the first thing you try doesn't work.

Yes, the Onkyo TX-NR686 does support Audio Return Channel (ARC).