fix settings ui issue

src/settings-ui/Settings.UI.Library/MonitorInfo.cs

@@ -406,6 +406,15 @@ namespace Microsoft.PowerToys.Settings.UI.Library
             return string.Join(System.Environment.NewLine, lines);
         }
 
+        /// <summary>
+        /// Refreshes the ColorTemperature property binding to force UI re-evaluation.
+        /// Called after AvailableColorPresets is populated to sync ComboBox selection.
+        /// </summary>
+        public void RefreshColorTemperatureBinding()
+        {
+            OnPropertyChanged(nameof(ColorTemperature));
+        }
+
         /// <summary>
         /// Represents a color temperature preset item for VCP code 0x14
         /// </summary>

src/settings-ui/Settings.UI/ViewModels/PowerDisplayViewModel.cs

@@ -327,9 +327,12 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
             // Sort by VCP value for consistent ordering
             presetList = presetList.OrderBy(p => p.VcpValue).ToList();
 
-            // Create new collection and assign it - this triggers property setter
+            // Create new collection and assign it
-            // which will call UpdateSelectedColorPresetFromTemperature() to sync the selection
             monitor.AvailableColorPresets = new ObservableCollection<MonitorInfo.ColorPresetItem>(presetList);
+
+            // Refresh ColorTemperature binding to force ComboBox to re-evaluate SelectedValue
+            // and match it against the newly populated AvailableColorPresets
+            monitor.RefreshColorTemperatureBinding();
         }
 
         /// <summary>