diff --git a/homeassistant/components/vizio/media_player.py b/homeassistant/components/vizio/media_player.py
index 67bb3d3633c..5a191b22cd4 100644
--- a/homeassistant/components/vizio/media_player.py
+++ b/homeassistant/components/vizio/media_player.py
@@ -137,7 +137,7 @@ class VizioDevice(MediaPlayerEntity):
         self._current_app = None
         self._current_app_config = None
         self._current_sound_mode = None
-        self._available_sound_modes = None
+        self._available_sound_modes = []
         self._available_inputs = []
         self._available_apps = []
         self._conf_apps = config_entry.options.get(CONF_APPS, {})
@@ -192,12 +192,9 @@ class VizioDevice(MediaPlayerEntity):
             self._volume_level = None
             self._is_volume_muted = None
             self._current_input = None
-            self._available_inputs = None
             self._current_app = None
             self._current_app_config = None
-            self._available_apps = None
             self._current_sound_mode = None
-            self._available_sound_modes = None
             return
 
         self._state = STATE_ON
@@ -215,7 +212,7 @@ class VizioDevice(MediaPlayerEntity):
             if VIZIO_SOUND_MODE in audio_settings:
                 self._supported_commands |= SUPPORT_SELECT_SOUND_MODE
                 self._current_sound_mode = audio_settings[VIZIO_SOUND_MODE]
-                if self._available_sound_modes is None:
+                if not self._available_sound_modes:
                     self._available_sound_modes = await self._device.get_setting_options(
                         VIZIO_AUDIO_SETTINGS, VIZIO_SOUND_MODE
                     )
@@ -226,13 +223,14 @@ class VizioDevice(MediaPlayerEntity):
         if input_ is not None:
             self._current_input = input_
 
-        inputs = await self._device.get_inputs_list(log_api_exception=False)
+        if not self._available_inputs:
+            inputs = await self._device.get_inputs_list(log_api_exception=False)
 
-        # If no inputs returned, end update
-        if not inputs:
-            return
+            # If no inputs returned, end update
+            if not inputs:
+                return
 
-        self._available_inputs = [input_.name for input_ in inputs]
+            self._available_inputs = [input_.name for input_ in inputs]
 
         # Return before setting app variables if INPUT_APPS isn't in available inputs
         if self._device_class == DEVICE_CLASS_SPEAKER or not any(
@@ -242,8 +240,7 @@ class VizioDevice(MediaPlayerEntity):
 
         # Create list of available known apps from known app list after
         # filtering by CONF_INCLUDE/CONF_EXCLUDE
-        if not self._available_apps:
-            self._available_apps = self._apps_list(self._device.get_apps_list())
+        self._available_apps = self._apps_list(self._device.get_apps_list())
 
         self._current_app_config = await self._device.get_current_app_config(
             log_api_exception=False