diff --git a/homeassistant/components/opendisplay/__init__.py b/homeassistant/components/opendisplay/__init__.py
index 4fcc7c95d0a2..fb695f84ab49 100644
--- a/homeassistant/components/opendisplay/__init__.py
+++ b/homeassistant/components/opendisplay/__init__.py
@@ -15,7 +15,11 @@ from opendisplay import (
     OpenDisplayError,
 )
 
-from homeassistant.components.bluetooth import async_ble_device_from_address
+from homeassistant.components.bluetooth import (
+    BluetoothReachabilityIntent,
+    async_address_reachability_diagnostics,
+    async_ble_device_from_address,
+)
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
@@ -83,9 +87,17 @@ async def async_setup_entry(hass: HomeAssistant, entry: OpenDisplayConfigEntry)
     ble_device = async_ble_device_from_address(hass, address, connectable=True)
     if ble_device is None:
         raise ConfigEntryNotReady(
-            f"Could not find OpenDisplay device with address {address}"
+            translation_domain=DOMAIN,
+            translation_key="device_not_found",
+            translation_placeholders={
+                "address": address,
+                "reason": async_address_reachability_diagnostics(
+                    hass,
+                    address.upper(),
+                    BluetoothReachabilityIntent.CONNECTION,
+                ),
+            },
         )
-
     encryption_key = _get_encryption_key(entry)
 
     try:
diff --git a/homeassistant/components/opendisplay/services.py b/homeassistant/components/opendisplay/services.py
index 9bbf17d51775..c5a7824c39ae 100644
--- a/homeassistant/components/opendisplay/services.py
+++ b/homeassistant/components/opendisplay/services.py
@@ -22,7 +22,11 @@ from opendisplay import (
 from PIL import Image as PILImage, ImageOps
 import voluptuous as vol
 
-from homeassistant.components.bluetooth import async_ble_device_from_address
+from homeassistant.components.bluetooth import (
+    BluetoothReachabilityIntent,
+    async_address_reachability_diagnostics,
+    async_ble_device_from_address,
+)
 from homeassistant.components.http.auth import async_sign_path
 from homeassistant.components.media_source import async_resolve_media
 from homeassistant.config_entries import ConfigEntryState
@@ -108,7 +112,7 @@ def _get_entry_for_device(call: ServiceCall) -> OpenDisplayConfigEntry:
     if entry is None or entry.state is not ConfigEntryState.LOADED:
         raise ServiceValidationError(
             translation_domain=DOMAIN,
-            translation_key="device_not_found",
+            translation_key="config_entry_not_found",
             translation_placeholders={"address": mac_address},
         )
 
@@ -171,7 +175,14 @@ async def _async_upload_image(call: ServiceCall) -> None:
         raise HomeAssistantError(
             translation_domain=DOMAIN,
             translation_key="device_not_found",
-            translation_placeholders={"address": address},
+            translation_placeholders={
+                "address": address,
+                "reason": async_address_reachability_diagnostics(
+                    call.hass,
+                    address.upper(),
+                    BluetoothReachabilityIntent.CONNECTION,
+                ),
+            },
         )
 
     current = asyncio.current_task()
diff --git a/homeassistant/components/opendisplay/strings.json b/homeassistant/components/opendisplay/strings.json
index 0d3e8e92cd21..90eb2b716afa 100644
--- a/homeassistant/components/opendisplay/strings.json
+++ b/homeassistant/components/opendisplay/strings.json
@@ -74,8 +74,11 @@
     "authentication_error": {
       "message": "Authentication failed. Please update the encryption key."
     },
+    "config_entry_not_found": {
+      "message": "Config entry not found: `{address}`"
+    },
     "device_not_found": {
-      "message": "Could not find Bluetooth device with address `{address}`."
+      "message": "Could not find Bluetooth device with address `{address}`. Reason: {reason}"
     },
     "invalid_device_id": {
       "message": "Device `{device_id}` is not a valid OpenDisplay device."