diff --git a/homeassistant/components/denonavr/strings.json b/homeassistant/components/denonavr/strings.json
index b01782adf32479f22fcc7f76b9d6c1d3f7a6a564..25648d974abcf7feaaea449a9744bb3c33169db3 100644
--- a/homeassistant/components/denonavr/strings.json
+++ b/homeassistant/components/denonavr/strings.json
@@ -27,7 +27,7 @@
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
       "already_in_progress": "Config flow for this Denon AVR is already in progress",
-      "connection_error": "Failed to connect, please try again",
+      "connection_error": "Failed to connect, please try again, disconnecting mains power and ethernet cables and reconnecting them may help",
       "not_denonavr_manufacturer": "Not a Denon AVR Network Receiver, discovered manafucturer did not match",
       "not_denonavr_missing": "Not a Denon AVR Network Receiver, discovery information not complete"
     }
diff --git a/homeassistant/components/denonavr/translations/en.json b/homeassistant/components/denonavr/translations/en.json
index 7afc68d8fc114f5ab4e60d05bb9de85bf6675591..c067d2b4754a26a31e734a514d925a5498908867 100644
--- a/homeassistant/components/denonavr/translations/en.json
+++ b/homeassistant/components/denonavr/translations/en.json
@@ -3,7 +3,7 @@
         "abort": {
             "already_configured": "Device is already configured",
             "already_in_progress": "Config flow for this Denon AVR is already in progress",
-            "connection_error": "Failed to connect, please try again",
+            "connection_error": "Failed to connect, please try again, disconnecting mains power and ethernet cables and reconnecting them may help",
             "not_denonavr_manufacturer": "Not a Denon AVR Network Receiver, discovered manafucturer did not match",
             "not_denonavr_missing": "Not a Denon AVR Network Receiver, discovery information not complete"
         },
@@ -45,4 +45,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}