If the function buttons or the control knobs on the Audio/Video (A/V) receiver no longer work, follow these steps to try to resolve this issue.
- Turn off the power to the A/V receiver.
- Unplug the AC power cord for approximately 30 seconds.
- Plug the AC power cord back in.
- Turn the power back on to the A/V receiver.
- Attempt to change the functions on the A/V receiver.
If the issue is still unresolved, service may be required.  Go to Product Repair.