diff --git a/src/components/SystemSettingDialog.vue b/src/components/SystemSettingDialog.vue
index 76da32e..aad6aa5 100644
--- a/src/components/SystemSettingDialog.vue
+++ b/src/components/SystemSettingDialog.vue
@@ -1160,13 +1160,19 @@ export default defineComponent({
       ($store.state.device_attribute & Protocol.EDeviceAttribute.OutputBoard) !=
         0
     );
+    if ($store.state.isSpecialVideo()) {
+      function_output_board_attribute.value = false;
+    }
 
     watch(
       () => $store.state.device_attribute,
       (value) => {
-        function_output_board_attribute.value =
-          (value & Protocol.EDeviceAttribute.OutputBoard) != 0;
-
+        if ($store.state.isSpecialVideo()) {
+          function_output_board_attribute.value = false;
+        } else {
+          function_output_board_attribute.value =
+            (value & Protocol.EDeviceAttribute.OutputBoard) != 0;
+        }
         function_mirroring_output.value =
           ($store.state.device_attribute &
             Protocol.EDeviceAttribute.MirroringOutput) !=