diff --git a/app/AppConfig.cs b/app/AppConfig.cs
index fe5d9de1..eb1577d9 100644
--- a/app/AppConfig.cs
+++ b/app/AppConfig.cs
@@ -377,6 +377,11 @@ public static class AppConfig
         return ContainsModel("GA401") || ContainsModel("FX517Z") || ContainsModel("FX516P") || ContainsModel("X13") || IsARCNM() || ContainsModel("GA502IU");
     }
 
+    public static bool IsInputBacklight()
+    {
+        return ContainsModel("GA503") || ContainsModel("GA403");
+    }
+
     public static bool IsStrix()
     {
         return ContainsModel("Strix") || ContainsModel("Scar") || ContainsModel("G703G");
diff --git a/app/USB/Aura.cs b/app/USB/Aura.cs
index 6a63e040..ebc6e53f 100644
--- a/app/USB/Aura.cs
+++ b/app/USB/Aura.cs
@@ -298,7 +298,7 @@ namespace GHelper.USB
 
                 if (AppConfig.IsAlly()) ApplyAura();
 
-                if (AppConfig.ContainsModel("GA503"))
+                if (AppConfig.IsInputBacklight())
                     AsusHid.WriteInput(new byte[] { AsusHid.INPUT_ID, 0xBA, 0xC5, 0xC4, (byte)brightness }, log);
             });