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kolsenJul 26, 2025
Why does my Onkyo Receiver show Error Code *-11, *-13, *-21, or *-28?
- JJasmine SmithJul 26, 2025
If the Onkyo Receiver displays Error Code *-11, *-13, *-21, or *-28, it indicates an internet connection error. Check that the IP address, subnet mask, gateway address, and DNS server are configured correctly. Ensure the router is turned on and that the receiver and router are connected with an Ethernet cable. Verify your router is configured correctly according to its manual. If your network allows only one client, disconnect other devices. If you're still unable to access the internet, the DNS or proxy server may be temporarily down; contact your ISP.
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