Quick answer
- Check that the HDMI cable is securely connected to both the receiver and the TV.
- Ensure that the correct HDMI output is selected on the Onkyo TX NR646.
- Confirm that the TV is set to the correct HDMI input.
- Try using a different HDMI cable, such as a Certified Ultra High Speed HDMI cable (paid link), to rule out cable issues.
Symptoms
When the HDMI output on your Onkyo TX NR646 is not working, you may experience:
- No video or audio output to the TV.
- A blank screen or "no signal" message on the TV.
- Intermittent audio or video dropouts.
- The receiver appears to be functioning normally, but you cannot get any output to your display.
Quick checks
- Verify that the receiver is powered on.
- Check if the TV is set to the correct HDMI input where the receiver is connected.
- Inspect the HDMI cable for any visible damage or wear.
- Make sure that the receiver's firmware is up to date.
Step-by-step fix
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Power Cycle the Devices: Turn off both the Onkyo TX NR646 and your TV. Unplug them from the power source for about 30 seconds, then plug them back in and power them on.
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Check HDMI Connections: Ensure that the HDMI cable is firmly connected to both the HDMI OUT port on the Onkyo receiver and the HDMI IN port on your TV.
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Select the Correct HDMI Output: On the Onkyo TX NR646, press the "Input" button on the remote or front panel to cycle through the available inputs until you find the one that corresponds to your TV.
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Test with Another HDMI Cable: If the issue persists, try using a different HDMI cable. Sometimes, a faulty cable can cause connectivity issues.
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Adjust TV Settings: On your TV, navigate to the settings menu and ensure that the HDMI input settings are correct. Some TVs have specific settings for HDMI ports that may need adjustment.
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Check for Firmware Updates: Visit the Onkyo website to see if there are any firmware updates available for your TX NR646. If so, follow the instructions to update the firmware.
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Reset the Receiver: If all else fails, consider performing a factory reset on the Onkyo TX NR646. Refer to the user manual for instructions on how to reset your specific model.
If it still doesn't work
If you've followed all the steps above and the HDMI output is still not working, it may be time to consult a professional technician or contact Onkyo support for further assistance.
FAQ
Q: Why is my Onkyo TX NR646 not sending audio to my TV?
A: This could be due to incorrect settings, a faulty HDMI cable, or a problem with the HDMI port. Follow the troubleshooting steps to identify the issue.
Q: Can I use an HDMI splitter with my Onkyo TX NR646?
A: Yes, but ensure that the splitter supports the same HDMI version as your receiver and TV for optimal performance.
Q: Is there a way to test my HDMI ports for functionality?
A: Yes, you can connect another device (like a Blu-ray player or gaming console) to the HDMI port to see if it works. If it does, the issue may lie with the original device.